Customer wants to use the NFA Odata API to pipe flow data into third party application.  Is it possible to specify a time range, like last hour or similar?

Time range or similar are not supported by NFA OData query at this time.  

You can apply "limiters" to the OData API and this is documented in the NFA guide:

https://techdocs.broadcom.com/content/broadcom/techdocs/us/en/ca-enterprise-software/it-operations-management/network-flow-analysis/10-0-0/reference/network-flow-analysis-odata-api/limiters.html

Please also check the ideation (submit idea, if one does not exist) page:

https://community.broadcom.com/enterprisesoftware/home

Select: Ideation