Assuming a Minerva user exists (and if not, add one with addminervauser) you can control these parameters with the minuser command. You can determine the rights for an existing user with,
minuser auth steevwhich might return,
bluetooth : r w cdplayer : r w mixer : r w mp3jukebox : r w vox : r x10 : r wYou can then add or change permissions by issuing,
minuser auth steev bluetooth set rw minuser auth steev mp3jukebox set roand so on.
When a user is using the web, Apache will authenticate the user against the user list in /etc/apache2/.htpasswd for example. This is the same user that is passed to minuser for authentification - it should match the Minerva user name.