Is it possible to use Uwp camera with Noesis c# SDK. Lets say I want to render almost everything with Noesis c# SDK but use Uwp CaptureElement.

Noesis renders to the bound render target. If you find a way to connect that render target with the camera, yes, it can be done, but that's something you need to handle externally.

I will little extend my question. Is it posible to make some hybrid Noesis/Uwp App where I can render With Noesis and also Uwp controls. The same question is about hybrid Wpf/Noesis app

Noesis can be rendered to a texture and then use that texture in UWP. And the same for the opposite way, if you find a way to render UWP to a texture then you can use that texture with Noesis.