Network game problem

I am playing network game with my colleague over LAN, and everything was OK until short power failure, when LAN was down. He was in the middle of the match, so he lost control. Then, he clicked on his name in the game status on my PC and resumed control, to see how the match finished. However, when I load the game now, I am in control of both users, and he can not take control of his team anymore, as it's "locked" on my PC. Is there a way to disconnect second user from my PC, so he can join again with his old team?

change the manager you are controlling (from the main manager menu) to the one you don't want to be, go on holiday and disconnect from network client. Or you could try kicking yourself from the game status screen.