Is it possible to allow selective users part of a group only to watch the result from cqwp in Sharepoint 2013 on intranet homepage?
You can turn
audience targeting on the list. Go back to each of the files and target them to the appropriate audience and then just use one webpart that honors the audience targeting.
You can better idea from steps mentioned in below MSDN article.
Please check the content for Target list or library items to an audience in above article.