Thank you for these examples.
I created the file /var/www/fog/lib/hooks/mobileusernologin.hook.php and pasted your first code, then changed the userLogginIn function with your 2 other codes (and replacing “username1” by “fog”), but I didn’t see any difference in each case: when logging to http://…/fog/management/index.php whith either “fog” account or a “test” account, I still see all the menus.
What am I doing wrong ?

@george1421 I’m using dnsmasq 2.76.
I just tried your ltsp.conf file and it works.
Thank you very much.