Limit the content of index page html for a specific users

hello,
I have an index page with access to all table and in 2 days they will be a new team and for this team, they need only one table on the index page. is it possible to make a condition in javascript like
if username starts with ATV
show only this button on the index page?
what is the name of the value where they are the username?
and how to do it if someone can help me?

Thanks

I think you can achieve something along these lines with data permission filters. See : https://docs.opendatakit.org/odk-x/data-permission-filters/
I am not sure if you can hide a whole table, but you can certainly make it so that users from the new team cannot add/delete/edit that table.