Ted, as far as I've discovered, in the being of the game the multiplay seems to work...but as time goes by and you start transporting your units, this is where the multiplay starts to stummble.
As of yet, I have not been able to finish a multiplay game - be it LAN or WAN.
I'll let the forum know if I do manage to eventually finish one, but I realy doubt its possible with the current version of CTP2.
PS: In return, let the forum know if you eventually discover how to finish a multiplay game