Do you have security levels on client data so I can restrict my staff from accessing private info?

Do you have security levels on client data so I can restrict my staff from accessing private info?

Hi there, 
Is there a way to restrict my staff from viewing private information on my clients that is very confidential? I envision having a section on the client contact form that is only able to be viewed by the admin. Do you have different security levels? 

Please advise. 

thank you!

Marla