Possible to set collision mask of created object?

In my project I dynamically create sprite-objects with physics enabled.

-> System: Create object ...

Next, I would like to insert an action to set the collision mask to circle.

But in the settings for Physics there is no entry for that property.

(Only if I create instances during design time, it is possible to set this property in the properties-bar)

Is there a possibility to set the collision mask for dynamically created objects?

Thank you!