Dropping a specific Owner from a certain IP

[Scott Mayo <sgmayo@xxxxxxxxxxxxxxxxxxxxxxxxx>]

I have my filter set up with 1 internal nic and 1 external nic.  My 
workstations are addressed 10.0.0.1-10.0.255.255 with a subnet of 
255.255.0.0.  My filter 10.0.0.1 has Dansguardian and Squid/Squidguard 
which authenticates through my Samba server 10.0.0.5.

I have a generic user 'user' that I give to a lab in the elementary 
(10.0.8.1-10.0.8.255).  Is there some way that I can stop that generic 
login from being used from anywhere else?  I tried the following, but it 
did not do anything.

iptables -A OUTPUT -m owner --uid-owner 10000 -s ! 10.0.8.0/24 -j DROP

10000 is the uid of 'user' on my samba server.  Is the uid actually 
pulled from the filter server?  If so then I guess that I cannot do this.
Thanks for any info.

--
Scott Mayo
Technology Coordinator
Bloomfield Schools
PH: 573-568-4564
FA: 573-568-4565
Pager: 800-264-2535 X2549

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