Binding program/process to NIC

Right, I have been working on this for a week now, I ended up with ForceBindIP and ProxyCap but I still cant get things work the way I want them to. And its driving me nuts.

I want to be able to bind certain processes/programs to certain Network Interface Cards/Adapters. I have 2 and both are connected to different networks.

The problems with those 2 programs are following

ForceBindIP: doesnt work on stuff that launches 2 or more processes, or the process I want to route to the said NIC is launched after the main(bound) process.

ProxyCap: No option to route processes to local networking interface.
I need something median of these two, a way to bind several processes to NIC.

Why do I want/have to do this?
- I'm streaming online games, and I cant stream good quality with just one connection as both are only OK for one thing.

If anyone knows either how to bind process afterwards with forcebindIP, use proxycap to route packets to local network interface or has any other solution, please let me know! I beg you.