PLE filter for Upper/Lower Track List

I would like to request a new filter in the Project Logical Editor that can include/exclude tracks located in either the lower or upper track list when the track list is divided.
(See Dividing the Track List for info on this feature.)

Example of usage:

Event Target Filters

Filter Target     | Condition | Parameter 1 | ...
Container Type is | Equal     | Track       |          And
Media Type is     | Equal     | Audio       |          And
Track List is     | Equal     | Upper       |
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