No. We do not, and cannot, try to regulate what people do outside the game. We are concerned with behavior inside the game, and the treatment and acceptance of all of the players inside the game, regardless of their OOG associations.
If you ask to be a lord in Keplerstan, and the ruler of Keplerstan tells you "No, we only give out lordships to people in our 'l33t g4mezorz' clan", then that is exclusionary, and against the social contract.
Though, of course, the exact details on "where the line is" would have to be a Magistrates case.
Actually, that would, IMHO, be a really good case for the Magistrates.