P: Currently Lightroom has the ability via "Cloud" to filter by orientation (landscape/portrait). This is needed for the local implementation.

This capability of filtering by orientation (landscape/portrait) is already implemented in the “Cloud”portion of Lightroom.   It is obvious some of the more resource intensive capabilities are limited to just being able to handled on the “Cloud” side but filtering by orientation is not resource intensive and seems can be easily handled locally as well.  In fact - There is a simple implementation of filtering by orientation in Bridge.  Currently it is necessary to export from Lightroom, only then to have to go over to Bridge to filter by landscape/portrait.

Thank you for your consideration of giving this same orientation filtering capability to the local implementation of Lightroom!