That’s a great question!
Although I realize this is not exactly what you were looking to hear, I’m afraid the recurring trigger will not allow you to insert conditions at this time. Instead, I recommend setting up a schedule for your integration to run using the in-built trigger, and then in the custom action part of the recipe, allow users to select the value you’d like to use. Then, you could run a “items_by_column_value” query to check the board for any matching items, return the relevant column data to your app and run the next step of the recipe.
To clarify a bit further, you will not be able to get ItemValues from this trigger’s output, as it does not run on an item level. This trigger will only allow you to configure a schedule for your flow to run on a specific board.
Would that fit within what you are looking to accomplish? What do you think?