How can I force certain applications to use specific network connections?

Question

Let's say I have two active network connections that let me out to the internet.

I want certain applications to only use Network Connection 1, while some others should use Network Connection 2.

Is this possible in Windows XP? If so, how can it be done?

Answer 1

ForceBindIP - Bind any Windows application to a specific interface (by IP or GUID).

ForceBindIP is a freeware Windows application that will inject itself into another application and alter how certain Windows Sockets calls are made, allowing you to force the other application to use a specific network interface / IP address. This is useful if you are in an environment with multiple interfaces and your application has no such option for binding to a specific interface.

Answer 2

ForceBindIP appears to work on 64bit Windows 7 if you put the DLL into the SYSWOW64 folder instead of the System32 folder.