How to add a logic to filter

If you are looking for a result of...

The following code example has the steps using your example data.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WCk7MLchJVfDILy7ILEnMUdJRCvYAEgaGur6JlbpGJkC2t4cBFAA5TkGujt5ujsEhQLZjaUm+gntqXmpRYklqilKsDunG+YT6OXtQx6jg0IAA1yDSzDIiw5exAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [FacilityName = _t, FacilityID = _t, OrderDate = _t, PatientID = _t, MealPeriod = _t, OrderMode = _t]),
    #"Changed Type" = 
    Table.TransformColumnTypes(
        Source,
        {
            {"FacilityName", type text}, 
            {"FacilityID", type text}, 
            {"OrderDate", type date}, 
            {"PatientID", type text}, 
            {"MealPeriod", type text}, 
            {"OrderMode", type text}
        }
    ),
    Custom1 = 
    Table.Buffer(
        Table.Sort(
            #"Changed Type", 
            {"OrderDate", Order.Ascending}
        )
    ),
    #"Grouped Rows" = 
    Table.Group(
        Custom1, 
        {"FacilityName", "FacilityID", "PatientID"}, 
        {
            {
                "innerTable", 
                each Table.SelectColumns(_, {"OrderDate", "MealPeriod"}), 
                type table [FacilityName=nullable text, FacilityID=nullable text, OrderDate=nullable date, PatientID=nullable text, MealPeriod=nullable text, OrderMode=nullable text]
            }
        }
    ),
    Custom2 = 
    Table.TransformColumns(
        #"Grouped Rows", 
        {
            {
                "innerTable", 
                each Table.AddIndexColumn(_, "Index", 1, 1, Int64.Type)
            }
        }
    ),
    Custom3 = 
    Table.TransformColumns(
        Custom2, 
        {
            {
                "innerTable", 
                each Table.AddColumn(_, "Order Mode", each if [Index] > 3 then "Auto Generated" else "Excluded"), 
                type table [OrderDate=date, MealPeriod=text, Order Mode=text]
            }
        }
    ),
    #"Expanded innerTable" = 
    Table.ExpandTableColumn(
        Custom3, 
        "innerTable", 
        {"OrderDate", "MealPeriod", "Order Mode"}
    )
in
    #"Expanded innerTable"