How to get Processor ID for a task claimed.

Hi Experts,

In our process flow we have two human activity  Validate & Confirm.

Each human activity has task (Validate & Confirm) associated with it.

Role is assigned as Potential owner in task level.

Now my requirement is to get the actual owner name/id when someone claim the task from UWL  form both the human activity.

I tried to map the TaskOutput-->TaskAttributes-->actualOwner  data to a reporting activity with a data source; but only getting the ROLE ID not the particular user. Is there any way I can get the task owner name/id ?

Moreover when a user just open the task from UWL and then close the window; then it treated as the user claimed the task, and its ID assigned as current processor. How do I get that info ? Because TaskOutput node will only generate when a task in completed (as per my knowledge)

Is it possible we can add TaskAttributes node to  TaskInput of a human activity Input mapping like below

Please let me know your valuable input. Any kind of suggestion is highly appreciated.

Thanks & Regards,

Sambaran Chakraborty