Well, I tried implementing the -ip_match with my CGI::Session, and I don't get any different results, when accessing the same script from computers with different IP's. I added this code:

      use CGI::Session qw/-ip-match/;
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instead of my usual use cgi::Session; line.

I also tried adding

$session::IP_MATCH = 1;
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to the mix, after the creation of the session object, and still I see no difference in the results on browsers with different ip's. I can email the copy & pasted URL, with session id in it (yes, I'm still doing that while I try this out) and the different computers still access the session info just fine and load the page up.

What am I missing here in the use of -ip_match ?