I want to create a Subnetwork which can get data from selected geometry on the Scene View.

Just like the node "Split":
1、Select the geometry on the viewport
2、Press down "TAB" and open the TAB menu
3、Type in "Split", and "Enter".
4、Then,the Split node is created and its parameter Group is the parameter I just selected.

Is there any way to get data from selected geometry on the viewport, and automatically fill in the params?