@Nash
Do you have other users of your client VPN? Do they need access to other devices?
I have other users (company users who need access), I setup a different vpn account for this "outside" user, this user I only want to be able one specific IP.
You can have one set of rules that applies to your client VPN. You can't make decisions, via the firewall, regarding access provided to individual users. Unfortunately.
I guess its not possible then because if I make change in client VPN, it will affect the company users + "outside" user