News article access [contao 3.2][BE]

Hi!

How to hide news article from other authors ? (in backend)

For example:

news article 1 [author: user1]
news article 2 [author: user1]
news article 3 [author: user2]
news article 4 [author: user1]
news article 5 [author: user2]


maybe something like this:

$objUser = BackendUser::getInstance();

if ($objUser->username != $arrRow['author'])
{
return;
}

user1 see only
news article 1 [author: user1]
news article 2 [author: user1]
news article 4 [author: user1]

user2 see only
news article 3 [author: user2]
news article 5 [author: user2]


but how?

maybe do something in dca/tl_news.php
$GLOBALS['TL_DCA']['tl_news']['list']

please help!