How Can I Block certain IP's Within Range of mynetworks?

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How Can I Block certain IP's Within Range of my...
\ Vadim Pushkin (15 Jun 2007)
. \ MrC (15 Jun 2007)
. . \ Vadim Pushkin (15 Jun 2007)
. \ Noel Jones (15 Jun 2007)
. . \ Vadim Pushkin (15 Jun 2007)

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Subject:	How Can I Block certain IP's Within Range of mynetworks?
Group:	Postfix-users
From:	Vadim Pushkin
Date:	15 Jun 2007

Hello All;

My mynetworks looks like the following:

mynetworks = 127.0.0.0/8, 192.168.1.0/24, 10.10.10.0/24, 10.10.20.0/24

I have a machine, 192.168.1.100, which I would like to prevent from using my
gateway. How can I write an ACL to prevent this, or a NOT statement to
mynetworks?

Thanks,

.vp