[CentOS] Hiding a network printer

I want to hide a printer that's connected to a Centos 6 printer server to prevent it showing up on some of the other computers on the local network.

Using system-config-printer, putting the IP address of the computer that I want to hide the printer from into the Access Control window for that printer doesn't work since it apparently wants a user name, not an IP address.

How can I specify that the printer can be seen only by certain IP addresses but not others?

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