Zend certified PHP/Magento developer

Isolate Open VPN Connection to User in Windows 11

I am connecting to an Open VPN server and want that connection to only apply to the user who has initiated it, no one else who may be concurrently logged in. I am happy to use OpenVPN GUI, or SoftEther or any Open VPN compatible software.

I have not tried much because I do not know where to start. I do not want to create a whole VM and hope to be able to only isolate the VPN adapter. Ideally, I would do this in the VPN client itself but I have found no such references in either of the two clients I listed above. If it can be done with Windows that would be fine too.

For the server I am connecting to I am only forwarding LAN traffic and not internet wide. It is a Synology NAS that is implementing Open VPN, and must use Open VPN.