module owner does not work

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Hello,

I'd like to use the owner module to limit access to somes hosts just for some users. But it doesn't work.
My rule is:
iptables -I OUTPUT -d 0.0.0.0/0 -m owner --uid-owner 1000 -j REJECT
This is a very wide rule, just for testing purpose.

But uid 1000 is still able e.g. to send emails from the shell using mail.
I googeled already a lot, and found people saying the owner-module was canceled in Kernel 2.6.14, others saying that it still works in kernel 2.6.18. Some say it does not work with a SMP host. But i have the default kernel and only one CPU. Please help me, i'm running out of ideas.
I'm running SLES 10 SP3, kernel 2.6.16.60-0.59.1-default, iptables 1.3.5 .

Bernd
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