Is this type of vpn configuration possible?

[ghurty]

Is it possible to use the openvpn part of pfsense or some other way, to allow different devices to connect to the pfsense over a vpn, and you can set it that they cant see each other, except for the main one which can see all of them?

Thanks

[GruensFroeschli]

Yes.
With OpenVPN this just a tick in a checkbox.