Thanks Chris! Found it. Really is time to get some sleep ;-)
New fixed version in http://wiki.splitbrain.org/plugin:ifauth
I wrote one plugin which now shows output based on group. I did not have time to find where the user-id is stored. It was not in $INFO[].
$_SERVER['REMOTE_USER'] - its actually shown on the the default template and not hard to find ;)
Cheers,
Chris
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