OneDB, thanks for your reply.

As mentioned the job is started through cron on a nightly basis.

I'm not sure how your solution will solve my problem. ps -ef | grep rman will
still find the original RMAN that is running, which is my problem.

Therefore, I am looking for a way to query a table to look for tag that
is being backed up or a way to associate a job name to my rman command. This way I can distinguish the difference.