[Zope] How to find out how is logged in on an NT domain at given IP

Hi I am looking for a way to find-out hwo s logged in at a given IP address. If somebody is logged in to an NT domain and tries to access Zope, I woud like to find out who he is. One possibility might be asking to a domainserver (with the IP of the user) and get the user name. Did anybody find a way for this? Note: smb_pam is not upto this job I think. Sedat Yilmazer Kibele Iletisim Sis. ve Serv. Ltd.