Add new user assigned only for downloading a certain theme

Hi everibody!
Some time ago I bought a wordpress theme. At this moment, I would like to give a client, a user connection to themeforest, but only for downloading this concret theme. So, this client can download when it’s need, without my permission. Is it possible?
Thanks in advance.

No it’s not.

Once you have set up a theme fore a client then you can create an app to access updates etc but they will never have access to download an item or transfer access to their account

Thanks a lot Charlie, all clear!