Heh, you're wrong, check out the Plugins section. Using a [free] plugin you can make TGF communicate with [free] MOOjama servers, you just have to program it for it. And if it's a 2-player only game, that shouldn't be too hard.

Read some TGF forums for tips on how to do it; I almost managed to get it working, but for some reason couldn't get some part of the functionality to work... I blame the fact I was running the server on another local machine and possibly messed up firewall rules.