Can you index a certain sourcetype and forward the remaining?

Hi I am new to Splunk and am trying to forward a specific sourcetype of data out. That part is successful but now I am having trouble with the next part; indexing the remaining sourcetypes. I am using a Windows Universal Forwarder to forward all logs to a Splunk Enterprise Instance. I want to Index the Perfmon logs but forward the Security and Application logs to a third Party source. How can I achieve this? So far all the documentation seems to indicate using Selective Indexing but there the information suggests setting the entire log to either be indexed or forwarded or both, not just the specific sourcetype.