Hi @markob ,
this is possible.
With the new MOBOTIX 7 FW 7.2.1.29 you can filter the MxMessage which comes frome the Vaxtor or FFGroup App via Variable
For Example:
$(MSG.LOCAL.VAXALPR.PLATE.LICENSEPLATE)
This shows the latest detected Licenseplate
You can have a look into the Metadata which are send from the App to the camera with the URL:
http://ip-adresse-camera/api/json/messages
Example:

Then you have to set the Right Tree into the Variable