One of the things that I do regularly is to allocate markups to plots on site layouts e.g. drainage, garden walls, etc.. These markups cross plot boundaries and using Spaces is definitely not an option.
What I'd like to be able to do is filter out the markups once they have been given a plot number AND not be able to select them again.
However, at present, even if the markup is greyed out as a result of being filtered, it can still be selected and the properties (Plot Number, etc.) can still be changed. This basically makes the filtering process pretty pointless and therefore the allocating process much more difficult that it needs to be. When you're looking at a site of 200+ units, this can add a significant amount of time to your workflow.