Well, considering that that tutorial is posted on a site which bills iteself as "Your Visual Studio and .NET Resource" and doesn't even know how to spell Perl, I wouldn't expect too much. That said, that tutorial isn't too bad. But to answer your question, no, there is no standard module Address; the author simply didn't provide the source for it. It was left as "an excercise for the reader", presumably.

Have you tried reading perlboot, the "poop" tutorial which ships with Perl itself? It's a pretty decent beginner intro. From there, proceed to perltoot and perlobj.