Dualboxing/Triboxing Lag Issues

So I moved recently and my internet here doesn't seem to be as fast as where I was living previously. I'm having issues where I get slightly laggy on one char while I'm dualboxing, and almost unplayable when triboxing. Are there any settings I can tweak to make it less choppy? Or plugins etc. If there isn't enough information listed please let me know I'd like to get this workable if at all possible. Thanks for the help ahead of time.

Awesome I'll give it a shot and see what works. Thanks for the reply!