I would find it helpful to have an option to fire off an email when a user connects to the routers vpn server.
ideally the option to fire off immediately or a daily report emailed at a specific time. The logged data should at minimum have username, IP address.
And if logging action had an option for running a script that would also be helpful.
Regards,
Josh
Assign the user an interface/IP and run a script when the interface/IP goes up/down.