Windows 8 Kiosk mode
(http://www.howtogeek.com/173562/how-to-easily-put-a-windows-pc-into-kiosk-mode-with-assigned-access/)
Now, to assign this app to Kiosk user... you have to login as Kiosk user and install the app again.
Then login back as administrator, and you can see the 'Metro browser' app from the list.
