Administer Users by Role | drupal.org

Allows users with 'administer users' permission and a role (specified in 'Access control') to edit and/or delete other users with a specified role.

If the user being edited has multiple roles, the user doing the editing must have permission to edit ALL of the user being edited's roles.

Also provides role-based control over user creation.

Works well in conjunction with the (optional) role_delegation module.

I wrote this module as part of a Kosada Inc development project --- this allows us to further delegate user administration. Site administrators can now create users without being given full "administer users" permission, and can edit a specified subset of the site's users depending on the combination of roles possessed by the editing user and the user being edited.