I had the same requirement (and more) and searched but couldn't find anything online. I created a custom solution which would store all post restore tasks in a database table and a DDL trigger would execute these post restore scripts. Since DDL triggers don't fire on database restore events, I'm firing an Alter Database command which will raise an ALTER_DATABASE event which in turn will fire up the DDL trigger.

Currently, I'm doing auto-user adds and even executing stored procedures to update configuration data stored in the app. database.