A report from WABetaInfo stats that WhatsApp is working on allowing users to adjust which contacts can see your “Last Seen” status.

As many users know, The last seen’s privacy options were Everyone, My Contacts, Nobody. The new option allows users to choose which contacts not share their last seen feature with.
As this is a feature leak, it is unclear when WhatsApp will release this feature, but since there are working on it, we can expect it to arrive in the coming months.