How to filter a Column having concatenated values with values selected in slicer

Hi Nagasai 
Here is the file with the solution https://www.dropbox.com/t/6K5MESKQs8A8aSH0
Your report looks like this

I used power query to split the concatinated column into 2

Then replaced null values in the 2nd column with the values from the 1st one

You should have a table of all unique Business Lines. Then create the relationships

Finaly create you measure

Amount = 
VAR Amount1 =
    SUM ('Fact'[Amount] )
VAR Amount2Table =
    CALCULATETABLE ( 'Fact', USERELATIONSHIP ( BusinessLine[BusinessLine],'Fact'[BusinessLine.2] ) ) 
VAR Amount2 =
    SUMX (
        Amount2Table,
        IF ( 
            'Fact'[BusinessLine.1] <> 'Fact'[BusinessLine.2],
            'Fact'[Amount] 
        )
    )
VAR Result =
    IF (
        COUNTROWS ( ALLSELECTED (BusinessLine[BusinessLine] ) ) = 1,
        Amount1 + Amount2  
    )
RETURN
    Result

 ihave to note that this works only for one selection. In case of multiple selection the values will blanked out.
Please check and let me know.
Thank you!