Contao extension to provide an author filter for the news list.
Simply create a newslist module and enable the author filter. You will then be able to select a default author, by which the news items will be filtered. This filter can be overriden via an author GET parameter. e.g. by using ?author=… or \Input::setGet('author', …).
This extension is also compatible with the news_categories extension. So you can filter by a category and and an author, if you wish to.