How to register web-hook to receive only notifications for a specific sales-channel

I am using Storefront API (I use Storefront Access Token generated by a private app) to create a mobile app as a Sales-channel for a Shopify store.

I would like to ask you how can I register Shopify web-hook to receive notifications when orders are created, changed… by our mobile app only.

For example. I will get web-hook notifications when a mobile shopper creates an order on our mobile app - not get notification if the shopper make the order on the Storefront website.

Thank you very much.