That is really just the second option I suggested (translate "data structure" to "database"). I'll admit that it's faster than I had been envisioning, since I wasn't thinking exactly along the lines of databases, but it still isn't what I think of as an elegent solution, hence my initial post. I'm more interested in this from a programming theory standpoint than from a practical one. I guess I should've made that more clear in my original post: I want to know if this be done in Perl, without the use of other technologies.

Another assumption you (and others) have made is that I'm at an ISP, and that I'm using RADIUS. I'm not. =)

On the plus side, your answer is certainly the sort the person I'm doing this work for would like. It's simple, and it uses technology already available to us. Thanks for taking the time to respond with it.
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Love justice; desire mercy.

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