Please whoever know it just clarify to me the following :
In Documentation: http://www.orchardproject.net/docs/Understanding-placement-info.ashx
ContentType. Scopes the contained
Place tags to a specific content type (such as
Page) or stereotype (such as
Widget; this feature is new to Orchard 1.1). ..>
It seems just exactly what I need : to filter just by Widget of ConatinerWidget sort of like this
But it does not work!? What is wrong in my seeing it?