In Magento 2 Marketplace Multi-Vendor module, the admin can even hide the customer information from the sellers.
For this, the admin will navigate to Stores > Configuration > Webkul > Marketplace > Seller Profile Page Settings.
Under the Seller Profile, the Page Settings section set the Display Seller Profile field as “No”.
This way neither the customers can view the seller details anywhere on the website. Nor the sellers can view the customer details on the orders detail page.