I've got a page with webzones and webparts on it.  I'd like to add a catalog it the page to allow users to pick a set of webparts to put on the page.  The problem with the catalog is that is shows ALL available webparts to the user.  What if I wanted to limit which webparts a user can see?  Is there a way to itterate through the list of webparts that the webzone catalog retrieves and display only the ones I want?

While this explains a few things it does not address my situtation.  I am still looking for an answer on how to determine what webparts I want to show in the catalog zone.

Look at the code in private void GetWebParts(), especially these lines:

// retrieve the web parts from the database:
List lMWP = GetMyWebParts();

In my case, "GetMyWebParts()" retrieves a list from a Web Service, and because I use Kerberos I can determine in the Web Service which data I need to return, based on the user that connects to the WS.

Protected Sub WebPartManager1_AuthorizeWebPart(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.WebParts.WebPartAuthorizationEventArgs) Handles WebPartManager1.AuthorizeWebPart
        Dim isAuthorized As Boolean = False

        If String.IsNullOrEmpty(e.AuthorizationFilter) Then
            e.IsAuthorized = True
            Return
        Else
            Dim roles As String() = e.AuthorizationFilter.Split(",")
            For i As Integer = 0 To roles.Length - 1
                If HttpContext.Current.User.IsInRole(roles(i)) Then
                    e.IsAuthorized = True
                    Return
                End If
            Next
        End If
End Sub