drupal6-mod-masquerade | masquerade module for Drupal 6 | Mehr ...
The masquerade module is designed as a tool for site designers and site administrators. It allows a user with the right permissions to switch users. While masquerading, a field is set on the $user object, and a menu item appears allowing the user to switch back. Watchdog entries are made any time a user masquerades or stops masquerading.
