How to connect a mobile app through the woocommerce API to “Create Order” for a product linked to a vendor

I want to connect a mobile app through the woocommerce API to “Create Order” for a product linked to a vendor such that this will create the sub-order automatically for a given vendor account. The woocommerce API does not provide this capability by default and the "post author" is assigned to the user authorised to make the API call. How do I go about this?