Assuming a comma will sufficiently split your street address into a field and the City, State, ZIP into another field, you could just use another attribute splitter with a space.
Alternatively, you could use a PythonCaller Transformer to do the work for you. Here, City/State/Zip are stored in an attribute called "Location".
The python script I used here is:
# Template Function interface:
AttList = feature.getAttribute('Location').split(' ')
City = AttList
State = AttList
Zip = AttList
The parameters of the transformer are:
Note, this is essentially the same as an attribute splitter. But, there are a lot of ways to skin a cat.