It would be nice to add Tags based selection in Backup Job. Right now it does not have tags support and I have to add my VMs which I want to include in backup job to pool and select the pool in selection mode.
Yes, we discussed already internally that such a thing would be nice to have.
But I'd not cram it as yet another selection mode in, but see if we can rework the whole to something in the spirit of the new bulk-action (start, migrate, stop, suspend) filters, as that is quite flexible but still relatively easy to understand and work with.
The most work would be ensuring the matchers/filters are sound and can cover use-cases also in other areas.
As compared to the bulk-action filter this would not be done only in the frontend but implemented in the backend, and needs to be supported for a long time and should be ideally re-useable for all other sorts of endpoints where a list of VM can be passed.