Nested Menus in a Sitemap with a repeater

[Guest]

Is there a good way to show only a submenu for a particular sitemap node?

<Home>
<Products>
<product 1>
<product 2>
<product 3>
<Services>
<Downloads>
<About>




I'm using a Repeater, bound to a SiteMapDataSource, with a nested Repeater
inside the ItemTemplate. However, if I'm looking at a product, I'm getting
all the other submenus:

<Home>
<Products>
<product 1>
<product 2>
<product 3>
<Services>
<service 1>
<service 2>
<service 3>
<Downloads>
<download 1>
<download 2>
<download 3>
<About>