For example:
The Finjan Medium Security Policy was applied to a specific user and the administrator concludes that this URL should be allowed for this security policy.
In order to do so, the administrator must add the URL entry from the Web log to one of this security policy's URL white lists.
In the Finjan Medium Security Policy there are 7 URL lists in use:
Customer Defined Black List and URL Black List (Medium): Used by rule #5, "Block Access to Blacklisted Sites"
Allowed Large Download Sites, Trusted Sites and URL Bypass List (Medium): Used by rule #8, "Allow Trusted Sites"
Customer Defined White List and URL White List (Medium): Used by rule #25, "Allow Access to White Listed Sites"
After clicking on "Add to URL list" these URL lists are indeed listed:

This is the reason that not all URL lists will be displayed in the drop-down menu, but only according to the context of this Web log / URL entry and the security policy of the end user.