When publishing your client portal you have the ability to assign all incoming applications to a specific team member.
Go to Resources>Client portal and choose which team member will be in charge of managing applications created by clients through this portal.
️⚠️ A team member is always the owner of application created from their account on behalf of clients.
When publishing a portal you define an owner for incoming applications (created by the client)
If you want all team members to be able to see each others account, assign to everyone in the team the permission 'Super Agent' or 'Manager'