Hey Juanita,
it’s awesome that you have this problem, because just yesterday we published a new feature for filtering a dataset by current logged in user.
If the collection records are being inserted by the desired client => this filter will do the job for you.
If this is not the case, I will find a different way to help you. But first let’s see if this feature is enough to solve your problem.
Article for how to use the filter: https://support.wix.com/en/article/how-to-filter-a-page-based-on-the-currently-logged-in-user
Good luck!
Cheers,