windows 7 - Manage Internet connection for a program

I am using a Windows 7 PC with 2 network cards.

One for a public line and one for an internal line behind a proxy.

Is there a way or a software program where I can manage which program (Outlook, WM) uses which Internet connection or network card?

Using the option of interface metric is not what I am looking for. Someone also suggested me ZoneAlarm, but I dislike this program.

Answer

I found the answer:

http://www.r1ch.net/stuff/forcebindip/

It works like a charm.