Conditional with same/diff Fields.

You can do this in Power Query.
I commented out the steps to explain what is going on.

Hope this helps

let
//copied in source data from table on web
    Source = 
    Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45Wcs7JTM0rUXBU0lEyNDAwMrQwd3I1MATyvPIz8hSCczNLMoAct8TiEoWQosTkbKVYHVyaMknW5RoMtsonNakoP0/BKzE3tRjINVJwrkzOScWjB2STT2l2ooJLfl5yZjJBPW5BYHuCM3PKMhMVwhKrCktTq4hxIEhjJiGdsQA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Customer = _t, CUID = _t, #"Project Manager" = _t, Method = _t]),
    changeDataTypes = 
//set data types to text
    Table.TransformColumnTypes(
        Source,
        {{"Customer", type text}, {"CUID", type text}, {"Project Manager", type text}, {"Method", type text}}
    ),
//add a column that tests for 'i' at the end of CUID
    addIntegrationTest = 
    Table.AddColumn(
        changeDataTypes, 
        "Integration", 
        each if Text.EndsWith([CUID], "i") then "Yes" else "No"
    ),
//add a column that combines 'Customer', 'CUID' and 'Project Manager'
//removes the 'i' from the CUID if it is present
    addAmendCUID = 
    Table.AddColumn(
        addIntegrationTest, 
        "amendCUID", 
        each if Text.EndsWith([CUID], "i") then [Customer]&Text.BeforeDelimiter([CUID], "i")&[Project Manager] else [Customer]&[CUID]&[Project Manager]
    ),
//add a column that contains a list of 'amendCUID' values that have 'Integration' equal to 'Yes'
    addYesList = 
    Table.AddColumn(
        addAmendCUID, 
        "yesList", 
        each Table.Column(                      //turns the 'amendCUID' column into a list
            Table.SelectRows(                   //selects rows from the table that have 'Integration' equal to 'Yes'
                addAmendCUID, 
                each [Integration] = "Yes"
            ), 
            "amendCUID")
    ),
//add a column that counts the instances of the 'amendCUID' value in the list of all 'amendCUID' values
    addAmendCUIDCount = 
    Table.AddColumn(
        addYesList, 
        "countCUID", 
        (x)=> List.Count(               //function that counts the number of times the current row 'amendCUID' value occurs
            List.Select(                //create a list that contains only values equal to the current row 'amendCUID' value
                Table.Column(           //create a list of all 'amendCUID' values
                    addYesList, 
                    "amendCUID"
                ), 
            each _ = x[amendCUID]
            )
        )
    ),
//add a conditional column that displays 'Fast Track' if the current row 'amendCUID' value is in the 'yesList' and if 'countCUID' value is greater than 1
//'2 Cycle' is displayed if those conditions are not met
    addMethod = 
    Table.AddColumn(
        addAmendCUIDCount, 
        "Method2", 
        each if List.Contains([yesList], [amendCUID]) = true and [countCUID] > 1 then "Fast Track" else "2 Cycle"
    ),
//remove columns that are no longer needed
    removeColumns = 
    Table.RemoveColumns(
        addMethod,
        {"Integration", "amendCUID", "yesList", "countCUID"}
    )
in
    removeColumns