JSR 168/Multiple User Roles

[BIX]

Hello All,

I am building a portal based on the JSR 168. One thing I have not
figured out yet is how the specification allows multiple user roles.
For example, say you have two user roles, customer and developer.
Lets say that we want to give a client both customer and developer
roles. How would this work? Wouldn't the portlet orders for certain
pages be contradicting?

Any help would be appreciated...