Expanding filter scope from slicer selected value

Hi bruzie ,

Because of the relative complexity of your report, I can't make changes directly in your report, so I can only provide you with an example in Page2 of the pbix file you provided.
I add a new table like this:

And there is no relationship between this table and other tables:

Then I create a measure:

Measure = 
VAR A = SELECTEDVALUE(Slicer[UserName])
VAR B = 
CALCULATE(
    MAX('Users'[Group]),
    FILTER(ALL(Users),
    'Users'[UserName] = A
    )
)
RETURN
IF(
    ISFILTERED(Slicer[UserName]),
    IF(
        MAX('Users'[Group]) = B,
        1,
        0
    ),
    1
)

Make the settings according to the following figure:

And use the table which I added before to create a slicer, and the final output is as below:

When I select Mike, it shows Mike and everyone in Mike's group.
You can use this as a reference to try to modify the visual objects you need to create.

Best Regards,
Dino Tao
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