Simon,

 

You can specify the folder path based on the user role in the dotnetgallery as well.

 

For example:

 

You can do something like this:

 

Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
     If IsAdmin Then
         gallery1.FolderPath= "/Admin_imageFolder/"
         gallery1.ShowBatchBuild = True    
     Else
         gallery1.FolderPath= "/user_imageFolder/"
         gallery1.ShowBatchBuild = Fasle
     End If
 End Sub

 

Hope it helps.