I'm looking for settings that allow me to 'group' tasks.

Case in attached picture:
I have 2 alembic files to preview.
For each alembic, there are 4 frames tasked with assignments:
- fetch point data and export it to JSON dict.
- render (viewport - openGl).
Frames are not arranged in a sequential order; instead, they are selected according to a specific pattern: (start_f, 0.33, 0.66, end_f).

Is there are simple solution to force Deadlinescheduler to render that job on 1 node per alembic file instead of 4?
I assume group by 1 node will prevent the loading of the same alembic file multiple times, only loading it once.