Over time some nodes will have several links (relations) this becomes too difficult to process or understand - providing filters by tag type or property will help in analysing links. For example - for a company or property I would like to filter by Contacts or just notes.
This is an interesting suggestion, and we see an important need for it as the App grows and users save more and more things.
We have moved it up in our Development Plan and it should be ready in the next couple of releases. Stay tuned!!