Bandwidth Regulation

Hello,
I was wondering how one would go about regulating bandwidth of a server running RH Linux 8.0 and Apache. I am running a webserver, and want only one person to be able to download one file at a time. So, they can't click about 10 files and soak up lots of bandwidth. Plus, I would like to cap the whole server so it would only use about three-fourths of all the bandwidth on the line.

Thanks,
Robert

Haven't used myself, but my Web host uses this:

Ah, wonderful. Thanks!