how could i exclude the option a user/member to be logged in simultaneously from another device or tab browser
So you mean to check if user is already logged in on another device and not let them log in again?
You can look at querying your members when the users log in and then if they are already logged in you can see if you can do something, even if it is simple like move them to a lightbox or another page that says that you have already logged in etc.
Or when the user logs in you can capture that login time and do the same for when they logout, or create a memory item in Wix Storage that stores their login and if they login again on another device you can check your storage similar to your query of logged in users and not let them log in.
It has also been talked about in this old post here which could help you.
https://www.wix.com/corvid/forum/community-discussion/logging-members-out-automatically
Thank you GOS , if a member has done login , I would like to exclude anyone to connecting with the same member account . For example if I stream a webinar I wouldn’t want with the same account to be watching two people or more.