every channel in the mirc tray icon that has activity (name change, join/part) gets a check in the mirc tray,

however i would like to change this behavior so that it only displays a check infront of the channel when someon said something, or performs an action.
(so no check on join/rename/part)

I agree with that.

anyone?

"Anyone" what? Please don't bump a feature suggestion. You will only know if Khaled decides to implement a feature if it shows up in the next version. Otherwise, be patient.