Assigning multiple Responsibility Center

In Nav 2013 R2, we can assigned ONE responsibility center to a user but how can we assigned multiple responsibility center to a user.

In fact, in the company we have 5 responsibility center and junior staff has been assigned to their respective responsibility center.  However, the head of Dept needs to be assigned only to 3 resp. center and not to all the 5.  How same can be done?