Ability to create filters for multiple named projects, not just one or all

Currently, if I wish to create a filter it must be for either one specific project or for all projects. I would very much like the ability to create and save filters for greater than one project, but less than all. A list of projects in a multi-select would work just fine. In the case where there is other search criteria that is dependent upon the project (like components and versions), just don't allow the search to include those criteria if more than one project is selected.