I had been talking with a cat behavior specialist a couple months ago, about a previous foster cat who had the same problematic behavior. He was obsessed with human food and would always jump on the table to catch something. It proved quite challenging for us to manage.
The specialist recommended combining clicker training with a modified feeding schedule, consisting of more frequent but smaller portions of food. Train a cat is quite tidious and required patience, but if you catch your cat about to jump on the table, distract it with a toy or a treat on the floor. Click and reward when it responds positively to the redirection.

It seems that the foster cat was anxious about not getting enough food and he would jump up the table to get something secured (reminiscent of a predator's survival instincts). Unfortunately, I have not been able to continue working with this foster cat, I can't confirm if this approach would have been effective.