Currently, there is no easy way to target filters on your own messages.
The only way currently is to use nick_* but that might not be the most desirable use case for most users (imagine changing nicks often or having a server agnostic filter with different nicknames per network).
Something along the lines of self or user could be useful for these cases.
"notify_none+log1" is also a workaround.
irc: add tag "self_msg" on self messages (closes #840)