Comment by Morhaus

One of the advantages of using a proxy is that you can configure it per app.

For example, let's say I have 3 interfaces.

Interfaces (1) and (2) are low-latency and interface (3) is high latency.

I can start a proxy on localhost:1080 that redirects to interfaces (1), (2) and (3), and configure my download manager to use it.

I can then start another proxy on localhost:1081 that redirects to interfaces (1) and (2), and configure my game client to use it.