As a Supplier, you can easily filter for Canal orders from Shopify. Below are instructions on how to do so, as well as a video walkthrough.
Video demo for how to filter for Canal orders on Shopify:
Filter to see Canal orders
Go to Shopify Orders.
Select Filter > Apps.
Select Canal for Suppliers.
To see Storefront detail, download filtered orders to CSV
Click Export after filtering orders to those from Canal.
In the CSV file, review the "Note Attributes" column, which will contain the storefront(s) name.
Filter by Storefront as needed.