Yes, @Erica, I meant you can get a link for any ListItem and send it to someone, but then they have access to the Parent Document from there.
I TOTALLY Appreciate it is some long-a$$ stuff I posted, and will take some time for any review and consideration.
I wanted to be sure to make a comprehensive case and back it up. The case is, people deal with projects, sometimes having multiple aspects, then you have people, things, places, and time.
The filter-search example demonstrates how, even in a seemingly unweildy and complex depth of a situation, Dynalist is the sort of tool one could use to tackle tracking effectively, but then sharing adds another set of complexities.
I figured it does well to break it down to see just what that may look like …in case it helps tie these conceptual concerns together. (and to illustrate the potential value for consideration)
HTH