Erwin,
As far as I am aware, having multiple BATCH FACILTYs is not possible.
Sure you can create another or multiple FACILITYs and assign it to a job by adding MASTFAC to the jobs acid. You can call them BATCH2, BATCH3 and so forth and so on...
The difference with the default BATCH FACILITY and a user defined FACILITY is that you don't have to add MASTFAC(BATCH) to the jobs acid for jobs submitted in BATCH jobs. They pickup the BATCH FACILITY automatically without needing the MASTFAC.
Will let you know what I find.
Regards,
Joseph Porto - CA Level 1 Support