printer security fedora core 5 / 6

Ok
Here we go I have been totally thrown for a loop trying to lock out printers from select users on my network. I am running fedora core 5 and fedora core 6. I have IP printers in different departments through out the network. Each department only wants users in their department to print to their printer; currently any user on the network can send pri nt jobs to any department.

I thought that this would be a quick fix....boy was I wrong! Days later i am still trying to get this to work! So far I have tried the following solutions to fix the problem:

  1. I went into CUPs and set an allowed users list(here I used the machine hostname as the username; also tried it usining the IP address)
    2.I edited the cupsd.conf file to deny all and allow on the machine IP addresses that I listed.
    <Location /printers/admindeptpr01>
    order Deny,Allow
    Deny From All
    Allow From 192.168.0.12
    Allow From 192.168.0.13
    Allow From 192.168.0.14
    ...
    Allow From 192.168.0.36
    </Location>
    3.I also edited the printers.conf file to only allow specific users.
    Also I stoped and restarted the cups service after each change made to conf file.

If there is something that I am missing here, please point it out. Any help would be greatly appreciated.

Thanks in advance