FR: Use an exitnode on certain sites automatically

[Milo123459]

Could we see a way of automatically enabling exit-node routing on certain websites?

e.g, if I have a.com and b.com open, but b.com should use an exit node and a.com shouldn't.

[bradfitz]

Yeah, that seems possible.

[Milo123459]

any updates on this? i could try give this a go but im not too sure how far i'd get