Redirect on source

Hi,

I'm wondering about the following,

I'd like to use squid in http-accel mode for some websites of ours. This
I know how to set up.

Now I'd like to redirect some groups of users, on basis of their source
ip to another webserver. This is not for loadbalancing. I really want to
deny these users from one webserver and sent them to another.

So it looks like this:

when the user asks for www1.domain.com. I want to sent them to
www2.domain.com.

Can I set this up?
What redirector is best for this? (Ease of use, speed)
www1.domain.com is a link in a general homepage (www.domain.com). Is
this a problem?

Any comments on this would be greatly appreciated!

Thanks,

Danny Kruitbosch
RDC DataCentrum
the Netherlands