enable/disable user control

To: hobbit (at) hswn.dk
Subject: enable/disable user control
From: "mario andre" <rower.master (at) gmail.com>
Date: Thu, 27 Jul 2006 14:13:55 -0300
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Hi friends,

Is there a way to give permisson to one user enable/disable only a
specific host or a group of? Has someone already did this?

Any Hint?!

Thanks in advance,

Mario.