Make a browser into its own track/output?

[TomatoThomas]

How could I make my browser (Firefox) or a simple audio playing application (Foobar or even the Windows default) play on a specific output/input track? For example, I would want my audio from a game and my audio from whatever is playing in the other application to be on a separate track.

 

[Alabalcho]

What do you define as "track"? Audio device? Left/Right/Center?