I don't have much experience with scheduling but it seems the schedule is executed with the owner ID.
"An owner of a schedule can make a schedule available to other members of the top-level folder in which the schedule resides. The schedule owner remains the execution ID."
You would control the library list through run time environment and runtime environment assignments. This is set up in WRKWEBQRY, option 5=Work with Runtime Environments
#Db2#Support#SupportMigration