How can I achieve this?
"Currently, you redirect back to the client’s original
domain. What we need is for you to add a condition that would check
for the referrer (in some way or another; e.g. a GET variable,
which would be the best way, or through the HTTP referrer) and
redirect based on that. So that any traffic from
maloneyvision.proxy.voicestar.com goes back to that domain."