Although this is not a Perl solution, I'm willing to bet that there are Perl interfaces to it. It sounds like possibly you want version control software, such as CVS or Subversion. I'm reasonably new to version control software, but I must say, it is very nice. It sounds like you may not need to take advantage of the versioning if nobody needs to change the files (but maybe you'll find a use for it).

I've been using Subversion, so that is what I'll explain it with, but CVS is very similar.

Basically, you can put a directory or files under version control, at which point they are uploaded into the repository (and yes, they do call it a respository, which is why your question made me think of it). You can allow access to the repository through SSH or through HTTP, and you can use the normal SSH or HTTP restrictions on read/write permissions, authenticaction, and domain restrictions. The people or programs that you want to be able to get these files would request the appropriate files. This could be done in preset groups by using directories (as in, they could request a whole directory to get the files in it), or they could request any subset of them that they want.

Anyway, that's just a quick suggestion. It sounds like it may be what you're looking for, or it may not be. I hope it is helpful, though.

~Fatty