[Fighter]

собственно, в некотором роде, встала та же проблема

помогла решить LimitLogin

LimitLogin is an application written by Yossi Saharon, a Partner Technology Specialist with Microsoft in Israel, with help from Ofer Bar, an application development consultant. The application adds the ability to limit concurrent user logins and to keep track of all login information in an Active Directory domain. LimitLogin capabilities include limiting the number of logins per user from any machine in the domain (including Terminal Server sessions), displaying the login information of any user in the domain according to specific criteria, easy management and configuration through integration with the Active Directory Microsoft® Management Console (MMC) snap-in, the ability to delete and log off a user session remotely straight from the Active Directory Users and Computers MMC snap-in, and the ability to generate login information reports in CSV and XML formats.