Roon & VPN help

Ive successfully had Roon running on my NAS at home for months & been able to VPN into the NAS via my iPad to utilize the full Roon remote for local playback via the iPad pretty much anywhere Ive gone sofar.

I setup an L2TP connection that works really well however I would like to do two further things.

  1. I cannot remote in from other PCs for what ever reason. I am unable to access the NAS network via the same credentials that work with the iPad.

  2. Is there any way to not let my whole work laptop onto my network? Could I specify in windows to only let the Roon remote onto the network? Ive read around & people suggested just doing a remote desktop back into my own PC but Id rather not leave the PC on at home while at work to use Roon.