IAmTruthless It just doens't seem to be possible anymore. With the issues we faced with integration (and the issues the ACE project had), I highly doubt it's possible to modify the client in way that Riot is happy with to the degree that would be necessary to integrate such a feature.
With the old client, a possible replacement would have been regular expressions (e.g. "Ashe|Tristana"), but the new client doesn't support those anymore either.
FWIW, Riot said they eventually want to add something like this themselves, but I don't think it's very far up on their list of priorities. In any case, if anybody has any good ideas, we're always listening