Not easily, as far as I know. There are two things you could do, however:
1. Write a scriptlet that defines a
string as the concatenation of all the things you want (first name, last name, ssn, etc) and use that string as the labelProperty.
2 (Better, in my opinion). Modify your bean so that there is a getLabel() method that returns firstName + lastName + ssn etc. and use labelProperty="label" in the tag.
Hope that helps.