Beaten to the close! But I'll post this anyway since I think (though it isn't entirely clear from the description) that it's looking for nested, not simply multiple, inlines, and that's already requested in another ticket.
As written this ticket is more appropriate as a question on django-users -- you are asking if something is supported, not reporting a bug. Please do not use the tracker for support questions. As it is I think what you want nested inlines, which is #9025.
Also please do use the preview button, your code examples were hard to read as originally posted due to improper formatting.