but i have to do it for every user right?
these thousands of users :P
edit:
i still dont get it :x
i logged in as admin did SITE CHATTR +h "private" "-testuser1"
testuser1 can see the dir but cannot upload
but when i upload sth as admin tesuser1 can see the file in his private dir
dunno, @ raidenftpd each 'private' dir was linked to a usernamedir
i miss sth but dont know what, should be the same way like for predirs