Others' manastone spam is filed under "My spells"
 

See title. I'm not sure what category it's supposed to be, but manastone spam regardless of source is considered "mine" in the filter category. I like to have my own spells in the real chat window to separate it from combat spam, but then I'm stuck with manastone spam in my chat window.

If you turn spells to group only it works, but if you are still grouped with people you spam manastone you are screwed.