ioFTPD sections feature is used for that. Why would u need something else ? U say it's not exactly what you want, but u don't explain what's different in what you want and what sections offers.
fyi, script can't explude dirs from stats if you didn't make a separate stats section. ioFTPD store stats information per section, so to exclude a specific dir without using sections, the script would have to catch EACH upload and check the filesize and substract stats from the right stats section...
I think that snype's iotrial does indeed what i just said, counting on each file upload...
kinda un-efficient, but i guess some ppl don't care about effiency.
that's just a guess. never checked how ioTrial worked.