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Cigarguy101 I solved that problem by giving up dinner tables (except for cafes, restaurants, or friends' places where the context is different).
Eating a soup, stew, chopstick or fork meal, or eating with the fingers of one hand like Indians or Middle Easterners (with finger bowl and napkin to clean the hand after), can be done on living room couches, or cushions on the floor. It's comfortable, relaxed and easy.
Your PTSD -- was it one specific event, or a generic type of event repeated many times over?
What was the exact scenario?
Who was or were the people involved?
How can you change the setting to remove the specific triggers?
(You can reply here or by private message if you wish - but the main thing is to ask and answer yourself.)
If removing triggers is impossible, then could you try reducing the trigger(s) to something small or laughable?
The idea behind this would be to reduce the fear-trigger by becoming accustomed and non-reactive to a tiny fragment of it. And when that works, create a slightly stronger or bigger version of the same - for instance, a tiny matchbox tin soldier is replaced by a larger plastic soldier-doll.
Another option might be to get a dog with the right kind of calming temperament. As soon as you stress, the dog comes over, asks for affection, and distracts you from your focus on the trigger. A similar version is to use any form of distraction that's strong enough to work - untill eventually the trigger is no longer effective.
And there is also Eye Movement Desensitization and Reprocessing (EMDR) therapy. It was discovered and researched by Dr Francine Shapiro. Her book about it, "Eye Movement Desensitization and Reprocessing (EMDR) Therapy: Basic Principles, Protocols, and Procedures 3rd Edition" is very expensive, but it is frequently available in public libraries. I recommend reading it, as a full understanding of how and why it works is very helpfull.
Your therapist will probably know about it and might be willing to get training in it. There are also ways to teach yourself how to do it solo.