How to setup private proxies with different twitter accounts?

Say if i have 30 twitter accounts and I want to use private proxies for them. What software do i need? I want to run 2-3 accounts of a proxy. Trying to understand this process. Please help and sorry for newb question!

Maybe if word this question better i will get a response. I want to know how to rotate ips for the designated twitter accounts. Currently I am doing this manually with the browser add-on. Just thinking there must an easier way to do this especially if I'm managing lots of accounts...