Working with Collaboration Processes
When a user creates the first collaboration task within an existing task, the collaboration task is created within a unique collaboration process associated with the parent task. Any and all subsequent collaboration tasks started within the parent task are also added to this collaboration process.
The user who started the first collaboration task is the owner of the collaboration process in which all the collaboration tasks are running; that user will have access to all of the collaboration tasks. Note that the collaboration process owner can be a different user than the parent task owner.