Assigning different license for each database in a SQL server?

A license can be cut to be used per database (you pay for this option!) (this means a different license can be used for each database on the server). For example if you have a license for 5 users and you have 10 databases, 5 users PER DATABASE can work at the same moment. In this case you MUST put “Save license in database”* to TRUE, otherwise you don’t have this advantage.

*File=>Database=>Alter=>Tab Integration=>Save license in database.

Source:
License file in SQL
http://mibuso.com/blogs/kriki/2009/09/30/license-file-in-sql/