Hello Alessandro,
unfortunately, this is not possible. I will forward this request to the development team for discussion. In the meantime, you can add this feature request also to our Community and let the other users vote for your specific request to raise its priority (https://support.capturingreality.com/hc/en-us/community/topics/115000321889-Feature-Requests).
If you wish to display only part of the model, you can use clipping box for this purpose. It is located in the 3D SCENE context tab. Selection tools respect the boundaries of the clipping box.