Hi Naj,
I do not believe you can do this. I would suggest raising a feature request.
However, I had an idea that you could implement. If you were to write to an entity field, you could add that field to the display label as well:
Then this would be displayed in the tasks tab:
This field would also be displayed throughout the areas within the Visual Investigator, such as search results, recently viewed objects control, etc.
Cheers,
Paulius Peciura.