I think you want to search pushover in the forums. The pushover device is built-in to Hubitat. I'm not finding documentation in the HE documentation on its capabilities. So I'm not sure if you need to create multiple devices each with different settings or if you can embed strings into your message to adjust pushover handling of the message.
When there was a custom driver (user written), there was a way
If you still don't find it you may want to contact HE support
