On my linux machines all locally installed perl modules are installed in a path that includes the perl version, for instance:

$ locate Moose.pm
/usr/local/lib/perl5/site_perl/5.8.8/Moose.pm
/usr/local/lib/perl5/site_perl/5.8.8/Test/Moose.pm
[download]

If your windows install does not have the same feature, you're probably stuck with trying to load each one and seeing if it fails.

Update: maybe this link may help