As a developer, when I create an Application Webhook I will receive notifications for all events of the type(s) I subscribed to, across all shared inboxes.
My app users may only want to monitor a subset of their inboxes with my app, so I receive a large amount of data via my webhook which I simply ignore.
A feature that allows me to modify webhook subscriptions on a per-company basis to enable receiving webhook notifications from activity in specific inboxes only would be helpful.