If by "Supported Groups" you mean the item with the left and right icons that has group suggestions based on your friends groups, then yes it does not remove those. I'll make an update soon that includes this. I'm also adding keywords so you can filter posts. For example you could add the word "Trump" and it will remove any posts containing that word. I noticed the "Supported Groups" feature a few weeks after I released this plugin. I think it was a new feature by facebook.