The old MacOS is dead. Yes, there was a Perl port for it, but since OS X has been the default OS for about three years now, and ships with Perl, don't expect a lot of OS8/9 activity.

That said, I did use it back in the day, and IIRC, it had all the standard functionality that I wanted/tried, and I think that includes the socket functionality. That's been a few years, though, so don't take my fuzzy recollections as the gospel.

There were a couple sites that were dedicated to Perl on the Mac; maybe they're still around? I can't remember URLs or even names. Try googling for them.