One thing you could do is use an Enumerator to determine player state! You could set the options to Pedestrian, car, tank, plane, or whatever, and when you possess something switch that Enum value.
Then, use a SwitchOnEnum node (selecting your created Enum as the base) and it’ll give you all the outputs you’ll need. The reason we use Enums for this purpose is an enum can only be set to the things in its list, and only one of these things at a time.