Conditional REFER transfer

I'm trying to setup a call flow where a refer transfer is consumde (INvite created) for some refer-to destinations and passed through to the originator for all others.

Example 1:  Call comes from the PSTN to the ACME and routes to an internal contact center.  The contact center determines the call needs to an international external destination (prefix 011),  sends a refer to the ACME.  In this cal flow the ACME needs to terminate the refer and route the call to a different PSTN carrier for the international call.

(PSTN > ACME > Contact Center > REFER  To -ACME > INternational dialing PSTN)

Example 2: Call comes from the PSTN carrier to the ACME and routes to an internal contact center. The contact center determines the call needs to a national external destination (prefix 1),  sends a refer to the ACME. In this call flow the ACME needs to pass the REFER back to the originating carrier.