Have you read Get Next Work customization on PegaDocs?
I think the reason for your question, and I am making an assumption here: what you are expecting is a contextual element to Get Next Work? E.g. If I click Get Next Work on page X or widget Y I get a different set of cases?
If that is the case, Get Next Work is not designed that way, as @RameshSangili’s answer highlights, its about giving you the most urgent piece of work in the pool of work you have access too. There might be a way to figure out context but it isn’t in the configurations available to us.
IMO it would take some heavy changes to the extension points to figure it out and even then in a stateless architecture might not be 100% achievable. If you do figure it out, would make a great Constellation 101 to share with the community.