I don't believe that is possible, but you may be able to do what I've done, if your situation permits.
I have six backup selection lists, one for each server I'm backing up daily/weekly/monthly. Then I built another selection list called "All Servers", using the "Load Selections from Existing List" button and merged all six of the previous selection lists together into this new selection list.
Then I created a monthly full backup job, a weekly full backup job, and a daily differential job that uses a backup-to-disk media set with overwrite protection set for one week.
Next I created a duplication job for each of these three backup-to-disk jobs that scrolls them onto tape. The monthly duplication job uses a tape media set with overwrite protection set at six months. The weekly and daily duplication jobs both use another tape media set that has overwrite protection set at two weeks. Now I have BTD media on the disk drives for restores of anything a week old or less, with tapes to back them up for two weeks on the daily and weekly jobs, and monthly backups on tape for anything six months old or less.
As I said, your situation may not allow this, but if so, it works well for me.
