Filtering out fleet carriers is all well and good, but when transporting Cargo from high fleet carrier population systems it can be a lot of scrolling. If you were able to filter out other people's carrier and still see yours it could save some hassle and missclicks.
This could be extended to bookmarked items which could include anything that can be bookmarked but for this I'll use a friend's carrier as an example. Your friend has asked you to move 10 trips worth of cargo to their carrier and they'll pay you; right now the only thing separating carriers are names. If you could filter out everything except bookmarks it could save time once again, just bookmark your friend's carrier.
Bookmarking could also be done for trade, bookmark 1 station and filter everything out besides your Buy and Sell Station.
This could be extended to bookmarked items which could include anything that can be bookmarked but for this I'll use a friend's carrier as an example. Your friend has asked you to move 10 trips worth of cargo to their carrier and they'll pay you; right now the only thing separating carriers are names. If you could filter out everything except bookmarks it could save time once again, just bookmark your friend's carrier.
Bookmarking could also be done for trade, bookmark 1 station and filter everything out besides your Buy and Sell Station.