Shell Programming and Scripting

there is a system user ( eg. adm_usr ) that is assigned to run a system process ( program1 ) , now I want to let user have the permission to run this program , so I want the user can su to this user before run the program ( like below ) , but now it can't becaus the ID adm_usr is not null password , is it possible ? thx.

If I want any user who run the program ( program1 ) can copy any file to a specific path , while login ID adm_usr:ADM have this permission to do it , what can I do ? thx

Check the link by Perderabo.
File permission bits
It will give some idea.