Access restriction is not possible within a VR project at the moment. However, you can use a workaround via our "open web link" and "passcode" feature.
Instead of restricting a dedicated scene, the user could jump to a new VR project via "open web link" in a new tab. That new VR project can consist only of the scene that should be restricted. Additionally, the new VR project can be restricted through passcodes.
To set a passcode protection, navigate to the publishing part of the VRdirect Studio and into your published project. Then, go down to the sharing section and click on the button "Set Project Passcode". Here, you can define and activate a 20-character passcode of your choice.