Embedded RLS

Hi dinesh123 
Please try

[Program] IN
VAR String = USERNAME ( )
VAR Items =
    SUBSTITUTE ( String, ",", "|" )
VAR Length =
    COALESCE ( PATHLENGTH ( Items ), 1 )
VAR T1 =
    GENERATESERIES ( 1, Length, 1 )
RETURN
    SELECTCOLUMNS ( T1, "Project", PATHITEM ( Items, [Value] ) )

dinesh123 
Please try

=
[Child_code]
    IN
    VAR Input =
        USERNAME ()
    VAR Length =
        LEN ( Input )
    VAR IndexSep =
        COALESCE ( FIND ( ":", Input, 1, BLANK () ), Length )
    VAR String =
        IFERROR ( RIGHT ( Input, Length - IndexSep ), BLANK () )
    VAR String2 =
        COALESCE (
            String,
            CONCATENATEX ( VALUES ( ChildOrg[Child_code] ), ChildOrg[Child_code], "," )
        )
    VAR Items =
        SUBSTITUTE ( String2, ",", "|" )
    VAR Length =
        COALESCE ( PATHLENGTH ( Items ), 1 )
    VAR T1 =
        GENERATESERIES ( 1, Length, 1 )
    RETURN
        SELECTCOLUMNS ( T1, "Project", PATHITEM ( Items, [Value] ) )