If you want to block or monitor a web site that is not listed in the URL database, you must create your own filter for the URL, called a "custom filter."
A "custom filter" lets you assign non-rated URLs to an existing filter category (e.g. adult, nudity, sports, etc.), or override a URLs current rating in an existing filter category, or override a URLs current rating using one of iPrism's pre-defined local categories (Local Allow, Local Deny) that make it convenient to flag a URL as allowed or denied across one or more existing profiles, see:
How do I use Custom Filters?