'Lookup user information about the specified address pair.'

def lookup(self, portOnServer, portOnClient):

    self.queries.append((defer.Deferred(), portOnServer, portOnClient))
    if (len(self.queries) > 1):
        return self.queries[(-1)][0]
    self.sendLine(('%d,    %d' % (portOnServer, portOnClient)))
    return self.queries[(-1)][0]
