I don't think it's possible. however, what is possible and achieves roughly the same affect is to query the system catalogs (or information schema) and via dynamic sql cut trigger funtions/procedures by looping the results of your query. non-dynamic sql will usually be a bit faster than dynamic as a bonus, the only downsie is you are creating a lot of functions, albeit in easy to manage fashion. If you are really clever, you can put your trigger functions in a special schema for organizational purposes.
Thanks for that hint. I've been thinking about that ... I do similar things to create all and trigger the partitions. And, since I have a regular naming for the partitions, I don't have to go to the catalogs. It seems a little excessive to have to create a different function for each of the triggers, however, when each one is basically the same.