static ip for pptp vpn client

Hi all,

I need to get a user into his home windoze box from the office. I’d like the traffic to pass through OS X Server (10.4.9)’s PPTP VPN. He connects up fine, but I don’t have a way for him to know the IP address he’s assigned by the VPN without asking me. Is there a way to assign a static IP to his home machine on the VPN, so that he can find it on his own?

Thanks,
Adam