Can my customer customize the member area/site experience for each individual member?

Hi! So I haven't yet utilized Member Areas/Member Sites on any of my customers' websites, but I have a customer now who's a personal trainer providing individual workout and meal plans for her customers. We are looking into how she could utilize Courses and/or Member Areas for her business. 

I would like to know if anyone has experience in similar cases, where you'd need to customize the content of the Member Area for each individual member, as an example: Anna would see her customized workout plan, but not the workout plan of Jenny.

Is that possible? 

Thank you so much, I tried to find the answer from Squarespace's materials but just couldn't find anything that would answer my question 😊

I would like to know this as well!