Customers want to show a Help Center collection only when it is opened from the web (or only from the mobile app), in addition to the contact-based Audience filter. Example: an FAQ collection for HR staff (Audience: Employee Role contains hr) that should be visible on web but hidden in the mobile app. Today the collection Audience filter is evaluated against the stored contact/session. "Platform (last seen)" exists but reflects the contact's last stored platform, not the client making the current request, so it cannot reliably restrict a collection when the same person uses both web and app. Widget Apps only hides the whole Help Center tab, not a single collection. Requested: a condition or setting evaluated against the current client (web vs iOS/Android app) for individual collections/articles.