I regularly use filters that only apply to certain cards on a dashboard.
Currently, it is difficult - especially for users - to have any visual queue that a given filter only applies to certain cards.
This is particularly true for non-Global filters that are presaved filters on a dashboard.
An easy step one would be to change the default color of filters that only apply to selected cards. Bonus would be a hover that tells the user which cards this filter applies to. Example pictured: This filter is specifically for a radio-button driven scatter chart.
The workarounds I've tried involve creating beastmode-duplicates of variable names to differentiate - but something more consistent, perhaps as described above would be helpful.