Here is another thread discussing this: How to predict multiple regressions from a model?
In a v1 framework, I have not found a straightforward way to predict multiple targets unless the data match the head pose dataset. It would be awesome to have an example case that is not coordinate-based, but multitasking. An example would be predicting dog height and weight from an image. Or a mixed-data type case where you predict class and a continuous variable, eg, breed and weight.