Select the users allowed to list on the site. Users that don't have selling privileges won't be able to see any selling related features in the Front End.
From the Private Site / Single Seller (Admin Interface -> Site Settings -> Private Site / Single Seller) menu, enable:
Private Site / Single Seller
If enabled, site owners can select the users that are allowed to list on the site.
Next, from the
Site Users (Admin Control Panel -> Users -> Site Users page select a user and click on User Options.
From the pop-up Edit User Options menu check the Preferred Seller box:
The confirmation screen will display a confirmation message: