Technology is disclosed for identifying dynamic groups that correspond to a user of a system. A system partitions a set of dynamic groups into multiple test sets of dynamic groups. The system selects a test set and determines whether the user corresponds to the test set. In one implementation, the system combines the filters for the dynamic groups in each test set into a single test set filter. The test set filter is satisfied if the filter of any dynamic group in the test set is satisfied. This allows the system to perform a single comparison between the resulting test set filter and the user's profile to determine whether the user is a member of any dynamic group in the test set. If the user is not a member of any dynamic group in the test set, the system eliminates all of the test set's dynamic groups from consideration, based on the single comparison. Otherwise, the dynamic groups in the test set remain in a list of groups that may include the user. This process is repeated for each test set. After each test set has been evaluated, new test sets are repeatedly generated and evaluated in the above-described fashion using the dynamic groups that are still in consideration. In each iteration, each test set contains fewer dynamic groups. This continues until each test set only contains one dynamic group. After performing an iteration with each test set containing one dynamic group, the only remaining dynamic groups are the ones that include the user as a member.