Filter resources to show only from people you're not following + more

So in say, bookmarked models, I would like to be able to filter by:

• People I’m not following (So it would filter out models from people I am following and only shows models from people I am not following)
  

• Models whose galleries I have not yet posted to - Would be good for improving interaction, if I could go through my bookmarks and see models where I haven’t posted anything to their galleries yet, so I can see this and generate something to post to their gallery.

Additionally, I would like to be able to say, filter images in galleries to show only posts by other people - Say I have a model that I use frequently in on-site generations in combination with other models, then post the results to the other models' galleries. Since that will also appear in my model’s gallery, if I want to look through the gallery for my model to see if anyone else is posting to it, it’d be pretty hard to with the volume of my own posts.