Create an inline where you have something like this
Load * Inline [
so you can have a listbox where you can choose which line charts to show up.
Now create a listbox with Dim as your field
and then go into your line chart, where you'll have Conditional option for each expression
Type this for your first expression:
GetSelectedCount(Dim)=0 or substringcount(GetFieldSelections(Dim),'AV_Tmp_PinchLine_L_1')>0
and so on for all the expressions and you're good to play with the chart.