UPDATE: You can do this using Assigned Access.
Left click on Start
, then click Settings
, then Accounts
.
Now click Family and other users
. In Other Users
click Setup assigned access
. Choose the account you want to restrict and then select the program you want to restrict the user to. A guide is provided here: http://www.winbeta.org/news/setup-assigned-access-windows-10-kiosk-mode