dooglus and Eric both confirmed the 206.174.121.150 address as having registered on their sites, it was posted in this thread and dooglus confirmed on JD chat. AKcoindigger nick was registered on JD 1 month before DMF was registered using the same IP.
On july 1st DMF used that account on JD, on july 1 that IP was not a Tor exit node, the full list of exit nodes for any specific day and hour is available here:
https://collector.torproject.org/archive/exit-lists/dooglus didn't confirm it in this thread AFAIK, but I also got the confirmation now from elsewhere. quite interestingly 206.174.121.150 has been used in June on JD and in August on MP, so 2 months later. is there a way to check if an IP is not assigned dynamically but is indeed static?