Here is what you need to change in order to get this.
Open the file qa_feed.php in qa-include folder.
Find
if (isset($question['opostid'])) {
$time=$question['otime'];
if ($full)
$htmlcontent=qa_viewer_html($question['ocontent'], $question['oformat'], $options);
} elseif (isset($question['postid'])) {
$time=$question['created'];
if ($full)
$htmlcontent=qa_viewer_html($question['content'], $question['format'], $options);
}
and replace with
$Author==null;
if (isset($question['opostid'])) {
$time=$question['otime'];
$userid = $question['ouserid'];
if ($full)
$htmlcontent=qa_viewer_html($question['ocontent'], $question['oformat'], $options);
} elseif (isset($question['postid'])) {
$time=$question['created'];
$userid = $question['userid'];
if ($full)
$htmlcontent=qa_viewer_html($question['content'], $question['format'], $options);
}
$useraccount=qa_db_select_with_pending(
qa_db_user_account_selectspec($userid, true)
);
$Author=@$useraccount['handle'];
Also add after
if (isset($htmlcontent))
$lines[]='<description>'.qa_xml($htmlcontent).'</description>';
the following line
if (isset($Author))
$lines[]='<author>'.qa_xml($Author).'</author>';