Hy

I would like to block/hide comments based on specific words used as usernames.
Specifically I would like to disable/unapproved comments for users who are using "X" word in their usernames.

So for example if I'm a new user and want to add a new comment and I put that "X" word in my username, then my comment will automatically be unapproved.

Is that possible to achieve? Maybe through some PHP code added in functions.php?

tnx!