Heroku Connect- Can we do selective data sync from Postgres database into Salesforce?

I am new in this area, so wanted to understand because as per documentation it seems we can do data synchronisation to salesforce so it is full data sync and not selective.

In case I need a selective data sync then do I need to build an application on top of postgres to do the filtering and then create records in SF using PE for example but then we can't use Heroku connect?

Thank you in advance for your response.