Please note that portal customization and restricted client access are exclusive to the Agency Edition. Learn more
here.
Your clients can view Scheduled Posts, and Published Posts under the Posts tab.
They will also be able to view Post Details.
They can initiate discussions from the Collaborate tab and will be able to view posts if they're tagged in them or in the comments.
They can view the reports shared with them in the Reports tab and also export them as PNG or PDF files.