Thanks!
New problem:
How to visually distinguish my own comment? At the moment I have such a line: <?php if((get_comment_author() == “my-name”)) { $oddcomment = “own”; } ?>
But if anyone else submits a comment under name “my-name”, their comments will be also distinguished. How to solve that? Is there a possibility to check whether the author is registered (2 conditions must be filled: author name “my-name” AND registered user)? Or is there a better way?