PPTP and Captive Portal

From:	Francisco Cruz <tito at iiia dot csic dot es>
To:	m0n0wall at lists dot m0n0 dot ch
Subject:	PPTP and Captive Portal
Date:	Mon, 05 Feb 2007 15:03:27 +0100

I'm very intereseted in show the Captive Portal to the users that are 
comming from VPN PPTP but I don't know how I can do it,
it is possible to do it in m0n0wall?

Thank you