http://download1.parallels.com/Ples...lels-plesk-panel-11.5-for-linux-based-os.html
[+] A database user can access multiple databases. Customers can now create database user accounts. The created accounts can be of two types:
* User accounts which have access to only one particular database.
* Universal user accounts which have access to all databases.
When creating a database, customers can either create a new account for the database or use an existing one. In earlier Panel versions, when Panel created a database, it also automatically added a database user account for accessing the database.