是，在注释表单中添加用户选择字段：

add_action(\'comment_form_after_fields\', function(){

  // allow only users who can moderate comments to do this
  if(!current_user_can(\'moderate_comments\'))
    return;

  $user = wp_get_current_user();

  wp_dropdown_users(array(
    \'name\'     => \'alt_comment_user\',
    \'selected\' => $user->ID,
  ));

});

add_filter(\'preprocess_comment\', function($input){

  if(current_user_can(\'moderate_comments\') && isset($_POST[\'alt_comment_user\'])){    

    $user = get_user_by(\'id\', (int)$_POST[\'alt_comment_user\']);

    $my_fields = array(
      \'comment_author\'       => empty($user->display_name) ? $user->user_login : $user->display_name,
      \'comment_author_email\' => $user->user_email,
      \'comment_author_url\'   => $user->user_url,
      \'user_ID\'              => $user->ID,
    );

    // escape for db input
    foreach($my_fields as &$field)
      $field = $GLOBALS[\'wpdb\']->escape($field);

    $input = $my_fields + $input;   
  }  

  return $input;
});