Use both WiFi and Ethernet on Mac

I remember trying to achieve this a while back, but unfortunately I couldn't find any help

 

The practical answer is 'no', because data is shipped around the Internet based on IP addresses and not applications. If you wanted to use your Ethernet for communications with other machines you have in the house and the Wi-Fi for Internet, that could be made to work (actually, depending on the set up, it could work that way right out of the box).

A.

 

It should be possible by using routes - per IP / IP-subnets... I don't how to do that per app manually, however, there's app which claims that it is able to do it.
http://www.proxycap.com

You have to set-up SOCKS proxy on Ethernet and then route torrent traffic to this connection.

SSH -D should do the trick

 

Easiest way, IMO, would be via parallels or vmware. Setup a VM to use for torrenting (ISOs, I hope), select the physical network interface you want it to use, and boom, done.