Yes, I'll try…
Sometimes, We can model a generic process, this process model the behaviour of some interaction between diferents actors.
For sample, one process between one secretary and her boss inside a big company.
But.. this process is so generic.. then is valid for all departments that has a secretary and boss…
If I model this… inside activiti, secretary is a group, and boss is another group… but then.. all secretaries can see work of other secretaries.. and for privacy reason this is not valid solution…
Then this implies a specific group for each department:
secretary-dep1, secretary-dep2, etc… and same for boss…
Then… If organization is bigger.. maybe I have 1000 groups for secretaries and another 1000 for boss.
In resum, I think that maybe we need some plus for define the scope of visibility of the data…
Do you understand my point of view?