I am starting to develop a cups printing system to the University which hired me. The system is in progress, but the main issue is user management (how to control unauthorized users from printing service since it is a network printer). I tried this command on terminal
lpadmin -p printer -u deny:user, but it doesn't work. So, in one hand this type of management will not be effective. Because, it is tedious to deny all users one by one, on the other hand the printing authentication should deny users by group and/or ask some authentication method(eg. username and password) to print.

So, please help me as usual.
I expect best user management method and/or tool for cups printing system from you.
Sorry for my bad English
Thanks all!

the cups server itself can be used to white/black list admins etc use port 631.

Hello there in my previous question, I have not gotten any solution. So, to give you a hint I tried to edit in this way on /etc/cups/printers.conf
----------------------------------------------------------------------
<Printer hp-niguss>
UUID urn:uuid:1310d9c5-e761-3449-5a43-082bd134750a
AuthInfoRequired username/password
Info hp-test
Location ict001
DeviceURI ipp://10.140.11.232/ipp
PPDTimeStamp *
State Idle
StateTime 1420576550
Type 8433684
Accepting Yes
Shared No
ColorManaged Yes
JobSheets none none
QuotaPeriod 0
PageLimit 2
KLimit 0
DenyUser 10.140.11.118
OpPolicy default
ErrorPolicy retry-job
Attribute marker-colors none,none
Attribute marker-levels 100,88
Attribute marker-names Black Cartridge HP Q5942A,Maintenance Kit HP 110V-Q5421A, 220V-Q5422A
Attribute marker-types toner-cartridge,fuser
Attribute marker-change-time 1420576174
</Printer>

open a browser enter this url:
http://localhost:631/printers/
select a printer
select 'Set allowed users' fro the 'administartion' drop down and fill in the box.

Hello there,
Thanks, Keith Hedger
I tried this your hint
but it didn't work

Do you know about PyKota for the purpose of cups printing management? Because, still I haven't gotten any system to manage this.

please help me!

In what way didn't work? Do you have admin privileges for cups? This should work you may have to reset the ownership and permissions of the various cups files. The users that need admin privileges for CUPS should be a member of lpadmin and if they don't they shouldn't.