Any camera that sends a message to Homey that results in an alarm_motion trigger in the app for that camera can be used as an input for Heimdall.
Like a Ring
Or Doorbird
for example.
If a camera sends some sort of message to Homey but not with the alarm_motion capability you can ask the app developer to integrate that into the app.
A workaround can be to create a flow that gets triggered by the camera and looks like this:
That way all other actions like logging and activating the alarm flow will be the same.