Disable links in WordPress Comments (except those from registered users)

Hi,

We recently decided to disable all links that were active within the comments, but we want the links posted by our registered users (contributor, editor, author) to remain active.

We added this function to functions.php but it has disabled all links in comments, including those posted by our registered users.

add_filter ('pre_comment_content', 'wp_specialchars'); // disable HTML in comments
remove_filter ('comment_text', 'make_clickable', 9); // autolinks in comments

How can we disable all links, leaving clickable only the links of our users (contributor, editor, author)?

Thanks