need help figuring out a proxy irule

actually, I have an additional question already. It looks like the way the proxypass irule works is it affects the entire virtual server.

 

 

The server I am trying to manipulate is a generic server that hosts a few different sites. If I apply the irule to that virtual server based on what seems to be included in the setup of the datagroup, I assume that it would end up affecting the other 2 sites, which isn't what I want at all..

 

 

so as a rule of thumb, if you're going to use proxypass, should it be on a completely separate virtual server?