Power User Security Working mechanism

Summary:

As per guide,

Artifacts (Forms, Dashboards, Infolets, Reports, Books, and Bursting Definitions):
– Users and Power Users can view or enter data only into forms to which they have permissions (and can work only with members to which they have permissions).

Question: Dimensional member access is applicable to Power User or not?

Content (please ensure you mask any confidential information):

"A staff is provisioned as Power User and dimensional level access is provided (Version) presuming it should work only for intended Parent/Child of Version dim members but it does not work like that in Web and all the dimension members from every dimension including Version dimension members are displayed/accessible