I think Hamachi means checking it for ADC users, since ADC clients send both the sharesize (SS) and the number of files they share (SF) in their 'MyINFO'.
But that can be easily checked clientside, with a clientside script, or when the Ptokax API for Flex is done with a hub script. It's a bit of an exotic request, so unfortunately for you, won't be added to the hubsoft itself.