how to know the user name corresponding to wf-batch in workflow(for user status)

Hello all,

for maintenance order in iw32

the status APR is set in workflow,

my question is if i see history i could see only WF-BATCH(as the status is set in workflow),

but i wanted to know the user name who has set the status APR in workflow..

is there any FM or Table where i can find the user corresponding to wf-batch.

thanks in advance..