if your only concern is LWP, then you can do this on a per UA basis using proxy settings... 

use LWP::UserAgent;
my $u = LWP::UserAgent->new; $u->proxy("http","http://www.apache.org/"
+); 
print $u->get("http://google.com/")->as_string;

[download]

UPDATE: your milage may vary based on the HTTP Server you connect to, see followup replies for details

In reply to Re: Direct a LWP connection to a different host by hossman
in thread Direct a LWP connection to a different host by Corion

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