May a Child Welfare Agency (CWA) or tribal organization that receives personally identifiable information (PII) from education records through the exception in FERPA use the PII for purposes other than addressing the education needs of the child?

No.  FERPA is clear that the PII from education records disclosed to the CWA or tribal organization under the 2013 exception to FERPA must only be used to address the educational needs of children in foster care placement. 

K-12 School Officials
Exceptions - Uninterrupted Scholars Act