This is an example showing how to filtering Images by Security Role Prefix:

 

First we need to detect which roles the user belongs to :

 

 

                   If role = "Admin" Then
                        ' skip admin 
                    ElseIf role = "Registered" Then
                        cntlCE.SetSecurityFileNamePrefix("Member_")
                    ElseIf role <> String.Empty Then
                        cntlCE.SetSecurityFileNamePrefix(role & "_")
                    End If