@herf More like, I have my art program I need to do color sensitive work on open on one monitor, whilst I have unrelated stuff open on my other 2 screens (usually chat programs/mail or non color sensitive references). Using the "disable when using [program]" feature disables f.lux on all 3 monitors when the program is active.
I would personally prefer it to only be disabled on the monitor I have said program open on. Or at least have an option like that, if that's at all possible. Because having all 3 monitors have flux disabled kind of hurts my eyes when I work late at night (which I do a lot, to be honest)
In my case, I already have dark themes on every program I own that allows me to do that, and flux combined with that is actually really nice and easy on the eyes.
Is that a bit more clear? Sorry, I'm not very good at explaining myself