[Darat]

You could look at editing infraction.php directly - I think the following edits would work but you'd need to check it and it's entirely at your own risk - where I use 21 you should use the userid of your generic Moderator account, where I use SMITH you should use the Moderator account's username.

Find: $infdata->setr_info('userinfo', $userinfo);

Replace with:$infdata->setr_info('userinfo', 21);

Find: $infdata->set('actionuserid', $vbulletin->userinfo['userid']);

Replace with: $infdata->set('actionuserid', 21);

Find: $infdata->set('whoadded', $vbulletin->userinfo['userid']);

Replace with: $infdata->set('whoadded', 21]);

Find:
$pmdm->set('fromuserid', $vbulletin->userinfo['userid']);
$pmdm->set('fromusername', $vbulletin->userinfo['username']);

Replace with:

$pmdm->set('fromuserid', 21);
$pmdm->set('fromusername', "SMITH");