Dynamic Filtering of Two tables based on One slicer, multiple selected values

Hi mysasai ,

Please try below steps:

1. below is my test table

Table:

Table2:

create with below dax formula:

Table 2 = VALUES('Table'[Name])

3. create measure with below dax formula

Measure2 =
VAR _str =
    IF ( ISFILTERED ( 'Table 2'[Name] ), CONCATENATEX ( 'Table 2', [Name],, "" ) )
VAR tmp = {
    "A",
    "B",
    "C",
    "D",
    "ABCD",
    "ABD",
    "ABC",
    "ACD",
    "BCD",
    "AB",
    "AC",
    "AD",
    "BD",
    "BC",
    "CD"
}
VAR _name =
    SELECTEDVALUE ( 'Table'[Name] )
RETURN
    SWITCH (
        TRUE (),
        _str IN tmp, IF ( CONTAINSSTRING ( _str, _name ), 1 ),
        NOT ( _str IN tmp ), 1
    )

Measure3 =
VAR _str =
    IF ( ISFILTERED ( 'Table 2'[Name] ), CONCATENATEX ( 'Table 2', [Name],, "" ) )
VAR tmp = {
    "E",
    "F",
    "G",
    "H",
    "EFGH",
    "EFG",
    "EFH",
    "EGH",
    "FGH",
    "EF",
    "EG",
    "EH",
    "FG",
    "FH",
    "GH"
}
VAR _name =
    SELECTEDVALUE ( 'Table'[Name] )
RETURN
    SWITCH (
        TRUE (),
        _str IN tmp, IF ( CONTAINSSTRING ( _str, _name ), 1 ),
        NOT ( _str IN tmp ), 1
    )

3. add two table visual with Table fields and add above measure to both visual filter pane, add aslicer visual with Table2 field, cancel the interaction between two table visual 

Please refer the attached .pbix file.

Best regards,
Community Support Team_Binbin Yu
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