Abstract: In a method of enabling a second system to manage selected anonymous users of a first system in a performance of a task, a rule is received from a second system, the rule specifying a criterion for a selection of a user from a plurality of users of the first system. A user is selected from the plurality of users, the selecting based on the criterion, the selecting including searching a record of a database, the record containing data pertaining to an activity of the user with respect to the first system, the database being inaccessible to the second system. A request is forwarded from the second system to the user, the request requesting that the user perform a task. A result is sent to the second system, the result including information pertaining to a performance of the task by the user.