look in _feedback.php
for this

<?php $Comment->author() ?>

In the technical documentation you will find this :
http://doc.b2evolution.net/0.9.0/evocore/Comment.html#methodauthor

author() 
Template function: display author of comment

author( $before = '', $after = '#', $before_user = '', $after_user = '#', $format = 'htmlbody', $makelink = false ) 
Parameters:
string   $before:  String to display before author name if not a user  
string   $after:  String to display after author name if not a user  // default [visitor]
string   $before_user:  String to display before author name if he's a user  
string   $after_user:  String to display after author name if he's a user  // default "[member]"
string   $format:  Output format, see format_to_output()  
boolean   $makelink:  true for link, false if you want NO html link  

Thank you- that helped a lot.

Yes I'm familiar with those boxes..
you can 'not show' them by just giving other parameters than the default onces.