There is the setting "via player" which I guess means that it runs the command as if the player had run it rather than up in the air as the server itself. But the commands for some things don't appear to run. I haven't bothered testing stuff like /give and /say but when I've tried to throw down some shenanigans through like worldedit or even spread players command it's either done nothing, or internal lagged the game for ages before returning the command as an error for some reason.