Question is there any way to divide touch area with new input system?

hello guys.

i'm developing virtual stick and virtual track ball function for my mobile application.

virtual stick ui is located at bottom of a screen of which background image is invisible square.

virtual trackball is not visible but a user can interact the rest of the screen except virtual stick area by dragging.

when i set the input action and attached on-screen stick component to virtual stick ui game object.

the result is like that when i drag virtual stick, the virtual track ball also detect the user input.

i want to divide touch area depending on perpose, but don't know the best way.

i use unity 2021.3.19f, new input system 1.5.1, MacOs

Thanks !!