Using the current user id, name, or role is a great way to provide more user centric information to you case workers. In IBM Case Manager 5.2 and it new client side scripting model, here's how you get that information.

• Add a script adapter widget to the Cases solution page
• Wire its incoming event to a custom event action button added to the toolbar of one of the page widgets

var userName = ecm.model.desktop.userDisplayName;
var userId = ecm.model.desktop.userId;
var role = ecm.model.desktop.currentRole.name;

var messageDialog = new ecm.widget.dialog.MessageDialog({
    text: "<b>Role</b>: " + role + " - " + userName + " - " + userId
});
messageDialog.show();