FILTER / USERELATIONSHIP? Which will work best?

Hi,

I've pasted below the model, I hope this helps. Put simply, 'North Fixtures' is the source table; the Home Scores and Away Scores tables convert the scores from 'North Fixtures' into a result for either the home or away team, and 'North Teams' pulls the results from the two tables back together in one, to arrive at a league table with points for wins and draws, calculating goals scored, conceded, etc.

What I would like to do is make it possible to filter North Teams based on date, e.g. limit the results that the tables reference to calculate the league table so that only matches played up to a certain date are taken into account, or only matches between two given dates are used in the calculations, etc - is this enough to go on? I don't know how to attach my pbix.