Yes.  Our Reseller package allows each of your customers to have their own cPanel, which they can use to control their domains, e-mail accounts and hosting.  This can be tailored to what you would like your customers to have access to.  The Reseller package comes with WHM access which allows you to create multiple, physically separate accounts for your clients.  Details on how to access your WHM area are included in your Eco Smart Hosting Reseller Account Information e-mail which is sent to you once your order is complete.