Supplier Frontend - Virtual Products
The admin can allow suppliers to create virtual products.
Please navigate to System → Configuration → Supplier Frontend Product Uploader→ Products Settings in the Magento Admin Panel.
Next, set " Allow to create virtual products" to 'Yes'.
To add a Virtual Product, please go to the Vendor Portal and click on "Add a Product" in the navigation bar.
Now you can easily choose Virtual Product in Product Type field and follow with the process to add a new product as described in Supplier Frontend - Adding Products article.