Do you have any experience from Kangaroo2 ? If yes notify for a demo … but exploiting/inquiring particle indices and the likes (per goal) is a task for code.
For K2 231 in action and with regard indices matters see files uploaded for Daniel in this thread :
BTW: That’s a static demo case - all the parametric functionality is removed - related with some nasty issue with regard post solution mesh normals … but if you dig into the C# you’'l see the way to extract info from particles based on their index. I have no idea how to do that via native K2 components … if I got(?) correctly(?) what you are after.
Anyway in case that you think that a similar demo could have some meaning for you describe with some details more what exactly is the issue.