yep, good idea, easy answer ; i did the same

create a VIRTUAL folder for every account/user. (you can add REAL subfolders after) ; create a login/pass for each ones..
go in Menu --> Virtual File System
Check 'List Protected Items Only For Allowed Users'
After that, user will ONLY be able to see their own folder (protected with their personal pass). And the no protected folder (public ones).
and voilĂ .
cheers )