WordPress at a glance
filter is not described

comment_author_rss filter-hook . WP 1.5.0

Filters the current comment author for use in a feed.

Usage

add_filter( 'comment_author_rss', 'filter_function_name_5614' );
function filter_function_name_5614( $comment_author ){
	// filter...

	return $comment_author;
}
$comment_author(string)
The current comment author.

Changelog

Since 1.5.0 Introduced.

Where the hook is called

get_comment_author_rss()
comment_author_rss
wp-includes/feed.php 337
return apply_filters( 'comment_author_rss', get_comment_author() );

Where in WP core the hook is used WordPress

wp-includes/feed.php 223
add_filter( 'comment_author_rss', 'ent2ncr', 8 );