Virtual folder to organise files by tags or collections




I'am using a lot the powerful "tag" system to organise and find my files. The problem is :

1) I can't save my tags request
2) I can't create (or drag and drop) my files in a "virtual folder" or "collections" (ref. to lightroom or tabbles).

Virtual folder would be very useful to sort and organise a collaborative work without dupplicating files, or I am the one who want to do that ?