There is no way to make SET=NTR a default for the DEMAND command. You could set up a PFKEY to echo back to the terminal:
DEMAND,SET=NTR,JOB=
so that the end user only has to key the jobname and then enter. Please see the CA 7 System Programmer Guide Chapter in the initialization file for how to set PF keys there or the CA 7 Commands guide to set PF keys in a user's profile (/PROF[S])
Please contact CA 7 support if you need further help with this.