Yes sir, I am Xi and I have the lumps from Wacchia to prove it. Jeff is not Xi, but he is still a trustworthy guy. I maybe have cheated on income taxes, expense accounts and former wives (I plead the 5th) but never something important like Conquer Club.
I can't think of a way to implement this without opening it up to a lot of abuse.
Maybe if you want to play with your partner, just wait until you can both be online at the same times and then join some games at the same time to make sure you both get in. Or join passworded games... Or start ...