"Filter Flow by" is the placeholder for configuring the type of flow "Screen Flow" and "Process Flow".
A screen flow is a type of flow with actions that are configured on shapes instead of connectors in the flow diagram. Screen flows are typically used to present a series of assignments to a single user, and allow the user to go back and change or review the input on each screen.
Process flow is the main flow for which you can create a case route to respective operators WL or WB, this can be persisted to DB,anything can be performed here. For ex: use integrator shape to call Websevices, call any smart shapes or what all shapes available can be used in this process flow.