I've got something similar I've had to solve, it might help you to find a solution.

I have a row with a checkbox that has to be enabled or disabled based on a boolean value in the row. So I made a datatrigger. Here's my code:

<Style TargetType="{x:Type xcdg:DataRow}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding Path=HasAllocatedAsset}"
                               Value="True">
                    <Setter Property="IsEnabled">
                        <Setter.Value>
                            False
                        </Setter.Value>
                    </Setter>
                </DataTrigger>
            </Style.Triggers>
        </Style>
 

I'm setting the Row to be IsEnabled = False, when an "HasAllocatedAsset" is True.

For your application, there should be a way to target your Setter (TargetName) at a certain object. If you manage to solve your problem, do show me your solution.

Good Luck.