如何在GUI应用程序中实现安全性？

I'm writing a GUI application that will have a user log in feature. Each user will belong to (at least one, possibly more than one) group and each group will have attributes indicating if certain rights are allowed or not allowed. The list of rights will cover things like editing things from the past, printing, deleting data, etc. Lots of different actions can be handled by the same right (printing can be initiated both from the menu and from the toolbar, for example).I'm writing a GUI application that will have a