Igor gets a Thumbs Up for first reply!
Yes, you can create a Guest Admin (only create guest passes), after you've created a Guest Access
service, assigned to a WLAN. From Configure::Roles, you can create a "Guest Admin" role, and use
Specify WLAN access, to limit them only to your Guest Access WLAN. There's a check box at Guest
Pass, to Allow guest pass generation, for this type guest pass only admin. Please browse thru the ZD
User Guide.
https://support.ruckuswireless.com/documents/1609-zonedirector-10-0-ga-zd-user-guide