[calani]

That would be sorta useful... such as checking the IPs of all the players in an event to make sure that someone isn't cheating and trying for a second chance at winning.

What would be more useful though, is adding a MAC address check. Maybe not avaliable through script, but as a replacement for IP bans, or an addition to them. IP bans are easy to get around, especially if you have a proxy or simply a dynamic IP.
That way two people on the same network could both play on a server without any problems, but if they're on the same computer they can be caught red handed for account sharing by doing something as simple as cheating at an event.