If you want all FTP forked tasks to have similar job names, set the _BPX_JOBNAME environment variable. For example, for WorkLoad Manager (WLM), accounting, and isolation of syslogd messages, you might not want each FTP user that is logged in to have its user ID for a job name.
//FTPD PROC MODULE='FTPD',PARMS=''
//FTPD EXEC PGM=&MODULE,REGION=4096K,TIME=NOLIMIT,
// PARM=('POSIX(ON) ALL31(ON)',
// 'ENVAR("_BPX_JOBNAME=FTPD"',
// '"TZ=EST")/&PARMS')