I have a therapist and a coach, and my coach cannot see my food logs?

If you have multiple coaches, it appears the food logger will log on the Chat feed of the first team listed. This would be the first team you onboarded with.

When you log metrics from the today tab, they will post a general log in the chat tab of the thread you are currently on. So if you were on your coach's thread this is where the metric would log. Both your coach and therapist have access to all of your data on their side, but your therapist only has access to your thoughts. 

However, that does not mean your coach cannot see the food logs being sent by you. Whenever you log your metrics, this will be displayed on both the Coach and Therapist's trackers for you, the client.