Having the option to set the profile level restriction VIEW to 'related' also for client users the would be ideal.
The option to see only the own, assigned and followed tasks would be very helpful to improve the navigation in the portal for clients.
Moreover, this option will improve the security of the portal: when there are more clients in a project, is important that each client must see only their tasks/issues.
The 'related' view option would be ideal both for tasks than issues
This profile level restriction is already available for standard users, please enable the same function for client users.