Hello Steve Mustafa,
You can use SiteMenu control which is wrapper for RadMenu control. The control has a property StartFromCurrentNode which you can use to determine which site map node to use as a starting point to build the node tree. So. when the property is set to true the menu will be bound to the Sitemap tree available from the current node.
If you want to show only items from a certain level you could use StartingNodeOffset it affects the starting node and with it the site map data hierarchy that is exposed by the SiteMapDataSource control.
All the best,
the Telerik team
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