Bypassing an F-Secure protection for LAN games

This is an issue we have at school when we try to play games in LAN, with or without a permission. Someone tries to create a server, but F-Secure blocks it and doesn't give an option to allow it. This is because the F-Secure and the whole OS don't have admin rights. F-Secure is also controlled from some master computer or so.

So, there probably is a way to bypass this, but is there anything that is relatively easy to do? The game we mostly have been trying is Age of Empires II, if that makes a difference.

OS: Windows XP Pro
F-Secure: F-Secure Client Security 7.12 build 108