Z-table Authorization for few users

Hello,

I want to restict user only for one Z_table (tab. maintenace was alreay maitnatined). While i had discussion with Basis team they said that its not possible to restrict only for one z-table for particular users. So could any one please let me know how could i restrict only for one table only for few users.

I am trying by creating one Z-tcode and calling this table (same as SM30), but not able to control the changes. i.e all users have display mode and few authorized users need to have access to change the table.

looking forward for ur reply..

cheers