Below are the search terms that you can use to conduct more specific searches. Here "name" is referred to the User-name.
creator:name - Help you to find all the waves created by name.
participant:name - Help you to finds all waves where user name is a direct participant (name may be a user or a group).
contributor:name - see all the waves where user name edited at least one message.
to:name - help you to search all waves where name is a participant, but not the creator.
onlyto:name - search all waves where name is the only participant, beside the creator.
onlyby:name - Finds all waves where name is the only contributor.
onlywith:name - Finds all waves where name is the only participant (name is either your own, or a group you belong to)
dfrom:name - Finds all waves with a direct message from name or waves with only two participants, where nameis a contributor.
dto:name - Finds all direct messages to name, or waves with only two participants, where the other participant is also a contributor.
from:name - Finds all waves in which name created at least one message within a wave.
to:name - Finds all waves in which name is a participant but not the owner.
with:name - Finds all waves in which name is a direct participant.
by:name - Finds all waves in which name is a contributor.
onlyto:name - Finds all waves in which name is the only participant besides the owner.
onlywith:name - Finds all waves in which name is the owner and only participant on a message within a wave.
is:note - Finds all waves in which you are the only participant.
Note: The keyword me can be used with all of the above operators to search for yourself.
[via : Google Wave Help Page]
