Personalise CMS "Members Template" page per user

I have created a CMS “Members Template” page. Each time a new user is added the page process creates a unique slug number. I suspect this is a unique item then.

How do I customise a specific users “Members Template” page? I want to embed different things for different user but as soon as I embed into one unique item all the items end up using the same embedded code. I want each user to have their page customised with user specific content (embedded code).

Thank you in advance for your help!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)