So I heard back from customer support about the no-trading on the same IP rule. No matter the nature of the trade, you cannot trade with anyone who is on the same IP as you are. This includes the circumstance when you start a trade from home then pop online at school while your trade partner is online at school. It's considered cheating for whatever stupid reason and is grounds for dismissal.
So nobody in 330 can trade with anyone else in 330. What I don't understand is whether someone else in Shaffer--say, the co-lab--can trade with someone in 330? Is that the same IP address?