Hello, What No website,
Vijaya means to say that your registered users can add products directly from frontend they can still enter in their seller panel to create a new product.
You can provide your registered users, seller privileges.
The frontend addition part is under testing, as it is least required by users as we have full-fledged seller dashboard in place.
Let us know if you need any further information.
-Abhishek
Team sellacious