I don't believe it's possible to do with the technology they use. From what I've learned about networking and IP/Port translation, it would take a tremendous amount of work and packet sniffing on their end to try and figure out what you are doing behind your own router. On the other hand, I could see them being able to enforce true box easily. If the EQ client has to share the hardware with another EQ client, it will know. You are caught. I think that enforcing 2-boxing will rely on players to help out. If you are sitting at zone in, and you see 3 characters just pop all the sudden, there is a good chance they are being boxed. Report it. You could have 5 computers behind your router, connected with 5 different accounts. That's perfectly fine and there should be no problem.