Mokum supports the following special characters:
+signifies AND operation
|signifies OR operation
-negates a single token
"wraps a number of tokens to signify a phrase for searching
*at the end of a term signifies a prefix query
~Nafter a word signifies edit distance (fuzziness)
~Nafter a phrase signifies slop amount
To search in posts written by some user, include from:johnsmith in your query.
To search for posts written in a certain group, include in:groupname in your query.