[pmwiki-users] connection limit

[dso]

I have at least one user that seems to be using a "web page change
checker" program but he has it set to check every 30-seconds.  This
eating up bandwidth and if more people do it, it could be a problem.

What is a good way to limit connections to x connections per y time
period and I'd like to show a lower bandwidth page with an explanation.

Is this possible to do with pmwiki?

Thanks for the help!

Daniel