Goal: filter email messages received from hide my aliases based on which Proton Pass Vault the login item / alias is stored in.

For example, a Proton Pass vault named "Important" has 2 items that reference hide my email aliases.

In Proton Mail, when filtering, have a condition that says, any email received from the "Important" vault.

This allows me to simplify the Proton Mail filters to easily group email for a new login or alias.

The alternative is described in https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/48302573-allow-to-filter-emails-by-alias