Firewall – Kerio WinRoute Pro

Anyone knowing how to block certain addresses via WinRoute Pro if one or two network pc is allowing to by passing the proxy server such as using MSN messenger?

For pc that are not allowing to use MSN messenger, i have no problem to trace via log file to see which website they are accessing whereas those that are by passing proxy server i can’t cause it’s not appearing in my log file.

Appreciate your reply. Thanks.