SelectionFilterElement

public static void CreateSelectionFilter(Document doc, View view)
{
    // find room tags in this view
    FilteredElementCollector collector = new FilteredElementCollector(doc, view.Id);
    collector.WherePasses(new RoomTagFilter());

    // collect tags whose room number matches criteria
    List<ElementId> tagIds = new List<ElementId>();

    foreach (RoomTag tag in collector.Cast<RoomTag>())
    {
        int number = Int32.Parse(tag.Room.Number);
        if (number % 3 == 0)
        {
            tagIds.Add(tag.Id);
        }
    }

    using (Transaction t = new Transaction(doc, "Create SelectionFilterElement"))
    {
        t.Start();

        // Create selection filter and assign ids
        SelectionFilterElement filterElement = SelectionFilterElement.Create(doc, "Room tags filter");
        filterElement.SetElementIds(tagIds);

        ElementId filterId = filterElement.Id;

        // Add the filter to the view
        view.AddFilter(filterId);

        doc.Regenerate();

        // Use the existing graphics settings, and change the color to Blue
        OverrideGraphicSettings overrideSettings = view.GetFilterOverrides(filterId);

        overrideSettings.SetProjectionLineColor(new Color(0x00, 0x00, 0xFF));

        view.SetFilterOverrides(filterId, overrideSettings);

        t.Commit();
    }
}