Hide 'Agile Board' by group of users

Background:

JIRA show button of 'Agile Boards' when Greenhopper is installed in system. In company's that use JIRA as a tool for customer-developer talk, it's important to control the information that can see customer/client.

I want to request a new feature for JIRA that allow to show or hide the button 'Agile Board' by group of user. The ideal scenario is that customers don't see this button but developers can see.