If you have FTP access then :
create a directory on your theme called ‘bbpress’
ie wp-content/themes/%your-theme-name%/bbpress
find
wp-content/plugins/bbpress/templates/default/bbpress/form-reply.php
Make a copy of this file, and put in in the directory called bbpress that you created above, so you end up with
wp-content/themes/%your-theme-name%/bbpress/form-reply.php
bbPress will now use this template instead of the original
then you need to chnage the line
<?php if ( bbp_current_user_can_access_create_reply_form() ) : ?>
to do a check for keymaster and author
something like
<?php if ( bbp_is_user_keymaster()) || bbp_get_reply_author_id() == bbp_get_current_user_id() : ?>
bbp_get_reply_author_id() might need to be bbp_get_topic_author_id() – you’ll need to try it to see
Give this a go, I’m very short of time at the moment, so haven’t tested !
Have edited the above to make it more accurate, but still may have errors !
