I can create an OpenVPN server from the OC 300 settings pages.  I can also export the .ovpn file.  But it seems this only supports a single signed private key.  Is there not a way to create multiple signed keys for different users?

I tried going into the VPN Users tab and creating a user but it doesn't allow me to select the OpenVPN server.

Is this by design or am I just missing something obvious?

Is there maybe a different page I'm missing that allows signing other private keys?