@Jasper. First of all, welcome to this site and have fun! Second, these are the Mod's pages I know:
Oli (site owner): http://www.vdiplomacy.net/profile.php?
userID=5fasces349: http://www.vdiplomacy.net/profile.php?
userID=261you can send them a PM and tell them your concerns whenever you suspect someone is cheating, whether the game in question is anonymous or it's not.
Third, whenever you have a issue of ANY kind about an anonymous game (possible bugs or glitches/questions on rules you didn't find on the variant page, etc...) please DON'T open a thread in the Forum or the goal of having an anonymous game will be lost forever. Please report it to the mods: just PM them.
Fourth, even if the game in question is non-anonymous, talking about its tactics or strategies, while the game is still ongoing, is frowned upon. I suggest you to wait that the game is over, open a "End of Game" discussion and having fun chatting about it with your (former) allies and enemies. If you need an urgent advice on tactics, you may open a thread with a generic abstract question, without posting the link to the actual game.
Again, welcome & have fun!