I checked the last months and I discovered 51 IP edits from the user in question BTW: December 2013 is when his massive attacks started.
There are also IP edits from the same person on the German WP.
In general, his strategy seems to be to take part on a discussion under his real WP username and at the same time, he makes controversional edits without being loged in in order to blur the relation between both actions. He added a lot of unsourced (and false) claims and he added a lot of claims that seem to be sources on the first view but the apparent source is either unrelated or highly unreliable (e.g. known to be false). When you combine this IP edit log with his logged in activities, it is possible to prove that there are some edit under an IP number that have been done few minutes before or after a logged in activity.
In order to understand his global strategy in harming cdrtools, you also need to know what he wrote on his real homepage under his real name and what he wrote anonymously at various other places.
Revision as of 10:32, 15 June 2014 IP 178.2.140.182: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612996395
Revision as of 10:26, 15 June 2014 IP 178.2.140.182: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612995917
Revision as of 10:09, 15 June 2014 IP 178.2.140.182: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612994608
Revision as of 10:06, 15 June 2014 IP 178.2.140.182: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612994323
Above this line, he definitely knows that his several identities are known as he tried to contact you related to this issue, sending a lot of false claims and attacks.
Revision as of 22:01, 11 June 2014 IP 178.7.187.141:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612554788
Revision as of 21:50, 11 June 2014 IP 178.7.187.141: https://en.wikipedia.org/w/index.php?title=List_of_Unix_utilities&diff=prev&oldid=612553688
Revision as of 21:26, 11 June 2014 IP 178.7.187.141: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=612551080
Revision as of 01:40, 21 April 2014 IP 94.216.78.182:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=605090981
Revision as of 01:33, 21 April 2014 IP 94.216.78.182: https://en.wikipedia.org/w/index.php?title=Talk:Cdrtools&diff=prev&oldid=605090369
Revision as of 01:22, 21 April 2014 IP 94.216.78.182: https://en.wikipedia.org/w/index.php?title=Template:Optical_disc_image_software&diff=prev&oldid=605089275
Revision as of 08:41, 18 April 2014 IP 94.216.77.27:
https://en.wikipedia.org/w/index.php?title=Talk:Cdrtools&diff=prev&oldid=604709991
Revision as of 20:24, 14 April 2014 IP 94.216.197.194:
https://en.wikipedia.org/w/index.php?title=Talk:Cdrtools&diff=604206770&oldid=604126927
Revision as of 18:52, 14 April 2014 IP 94.216.197.194: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=604195516
Revision as of 12:20, 12 April 2014 IP 178.7.188.4:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=603869329&oldid=603865119
Revision as of 11:45, 12 April 2014 IP 178.7.188.4: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=603865119&oldid=603855500
Revision as of 21:22, 10 April 2014 IP 94.216.223.143: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=603654672
Revision as of 05:10, 23 March 2014 IP 136.187.46.7 (Japan):
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=600834019&oldid=600271313
Revision as of 19:30, 24 January 2014 IP 178.2.132.136:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=592216497
Revision as of 15:10, 24 January 2014 IP 178.2.132.136: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=592182078
Revision as of 10:08, 24 January 2014 IP 178.2.132.136: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=592153461
Revision as of 10:05, 24 January 2014 IP 178.2.132.136: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=592153281
Revision as of 10:00, 24 January 2014 IP 178.2.132.136: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=592152814
Revision as of 18:13, 27 December 2013 IP 94.216.204.140:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587946985
Revision as of 15:13, 26 December 2013 IP 94.216.83.114:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587753934
Revision as of 14:27, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587747868
Revision as of 13:49, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Template:Latest_preview_software_release/cdrtools&diff=prev&oldid=587743304
Revision as of 13:49, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Template:Latest_stable_software_release/cdrtools&diff=prev&oldid=587743255
Revision as of 13:48, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587743198
Revision as of 12:41, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587737002
Revision as of 12:33, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587736249
Revision as of 12:24, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587735519
Revision as of 12:00, 26 December 2013 IP 94.216.83.114: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587733403
Revision as of 20:11, 25 December 2013 IP 188.98.221.232:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587661085
Revision as of 20:09, 25 December 2013 IP 188.98.221.232: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587660907
Revision as of 20:07, 25 December 2013 IP 188.98.221.232: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587660764
Revision as of 20:00, 25 December 2013 IP 188.98.221.232: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587660115
Revision as of 19:56, 25 December 2013 IP 188.98.221.232: https://en.wikipedia.org/w/index.php?title=Wikipedia:Templates_for_discussion/Log/2013_December_23&diff=prev&oldid=587659748
Revision as of 00:41, 23 December 2013 IP 178.7.182.200:
https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587304996
Revision as of 00:35, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=User_talk:Ekkt0r&diff=prev&oldid=587304447
Revision as of 00:34, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Wikipedia:Templates_for_discussion/Log/2013_December_23&diff=prev&oldid=587304297
Revision as of 00:20, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Template:Latest_preview_software_release/cdrtools&diff=prev&oldid=587302785
Revision as of 00:19, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Template:Latest_stable_software_release/cdrtools&diff=prev&oldid=587302735
Revision as of 00:18, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587302581
Revision as of 00:14, 23 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587302223
Revision as of 16:53, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587249808
Revision as of 13:37, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Talk:Cdrtools&diff=prev&oldid=587226564
Revision as of 13:35, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587226450
Revision as of 13:34, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587226316
Revision as of 13:32, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587226152
Revision as of 13:28, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Talk:Cdrtools&diff=prev&oldid=587225927
Revision as of 13:25, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587225648
Revision as of 13:20, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587225256
Revision as of 13:17, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Cdrtools&diff=prev&oldid=587225035
Revision as of 12:52, 22 December 2013 IP 178.7.182.200: https://en.wikipedia.org/w/index.php?title=Data_science&diff=prev&oldid=587222878