hook_theme with custom path
Is this Drupal 7? If so, you can do this:

function ohm_preprocess_user_register_form(&amp;$vars) {
   $current_path = current_path()
   $variables['theme_hook_suggestions'][] = 'user_register_form__' . str_replace('/', '-', $current_path);
}


This should allow you to use user-register-form--user-register-recruiter.tpl.php