Yes - it could be done ...
But it exactly MUST be done in future versions!! :-)
I just install PM, and of course - I can import/export ... but, if we talking about real business (not for theoretical marketing) we must filtering audience category based on different field, not just filter by name or country, BUT - by level of knowledge, professional skills, education, sex, age ...
but how user could do this?
This is free idea from real business ;-)
P.S. It's really strange situation - it's good product, but not finished :-(
what's do in this situation? - asking money back? or wait when it upgraded?
as minimum - You must allow user (admin) add field to user table, than it could use it as usual
For me personal - it's not a problem - I can write SQL, but I plan use PM as part of complex for my clients, they can't