SMC Networks SMC7004VBR V.2 - Manual (Page 41)

Advanced Setup
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This tool will also allow you to MAP DHCP IP Addresses to
certain MAC Addresses. This tool works well in conjunction
with the Parental Control rules to provide maximum control.
•
Website Blocking
The [Website Blocking] feature of the Barricade™ limits
access to website domains (i.e. www.somesite.com) or by
using keywords which will block any websites that have that
keyword in the URL. This feature is an ideal way to protect
your family members from questionable content on the Internet.