How to create a different type of hierarchy

How to create a different type of hierarchy

Hello,

I just started with Zoho and I am so confused.
I need to create a clients portal and include that on the hierarchy of my portal. 

So, I need dealers assigned to the main organization (mine) , and clients assigned to the dealers. And those clients may have two different roles of users assigned to them . 
Each of those clients should be able to see the information only of their own companies, for exemple, dashboards.

How do I configure that?

Thank you,