We need to know the login user of WCC (Workload Control Center) who has fired the job.
We can get this information through "autotrack" command which is not enabled by default. You need to enable "autotrack" prior to running the jobs.
Once autotrack is enabled then all version and changes information will be stored.
We can retrieve the details of the job runs as below:
autotrack -J <job name>
Example: Below command shows the last run details of job "hostname"
autotrack -J hostname
Here the job "hostname" was triggered by user "ejmcommander"
Refer below documentation link for more information on autotrack:
https://techdocs.broadcom.com/us/en/ca-enterprise-software/intelligent-automation/workload-automation-ae-and-workload-control-center/11-3-6-SP8/reference/ae-commands/monitor-and-report-on-workload/autotrack-command-tracks-changes-to-the-database.html