I am at my college and we are all in a IT class. Several people will be using DP for work during class and for HW. All same ip and they will prob be using their home ips as well.
You can have different members using the same IPs as long as there is no funny business. What you can't do is promote each others threads, give itrader, bump, shill, or do anything else that we would deem inappropriate. I don't know why so many students would need to access DP for school purposes, and why anyone would ever have DP homework. EDIT: Also make certain that you aren't using a duplicate account, because that qualifies as "funny business".