Would it help performance through our BM 3.8 SP5 server (NW 6.5 SP5) to have two paths through the BM server?

Specifically, we are having performance issues and wondered if we created two paths for our different class C IP ranges to go through. We own the XXX.XXX.24, .25, .96, and .106 IP ranges.

Can you setup proxy to route traffic for different IP ranges or does it just load balance all traffic?