I'm trying to counter multiboxing on my server and I am trying to achieve this with an SQL constraint. I know there is a way to disallow duplicate last_ip in auth.account but I want to allow 3 duplicate accounts from the same IP at a given time (I don't want to disallow friends/family/people in the same apartment complex to not be able to play). Is there a way to accomplish this or any better anti-multiboxing methods out there?