Mark Goeder Tarant might lie as much as he likes about not being involved in http://www.wikileaks-forum.com since 2013, but he inadvertently provides proof for the opposite:
Here he handles the Twitter account @wikileaks_forum to attack several supportive WikiLeaks accounts and provides a screenshot trying to construct some kind of slur on their reputation, instead, he actually reveals his own personal e-mail as he forgets to log out from Paypal.

And we know this is his e-mail address (part of a past address) because:

Twitter is full, full of proof, every few weeks, here we go again!