You can use this just as any other MM show region Server Behaviour, help for which can be found in the using dreamweaver
help file.
This extension currently only works in ASP and JSP.
Server Behaviors -> Show Region -> Show Region If User Logged In | Show Region If User Not Logged In
Show Region When User [Not] Logged In-ASP/JSP Support
This extension allows you to conditionally show regions when a user is logged in or not logged in using
Macromedia's default user authentication Server Behaviors.