Display name or alias of specific UserID

Hello

In our company we use a specific combination of characters to define the  USERID  nomenclature  of a SAP user.

Sometimes,  a user wants to access a record that is previously locked by other user,  and a message appears saying something like: "Record XXX is  locked by user: MT2RGIOP"  But Who exactly is  MT2RGIOP  ?

So users need to call  HelpDesk to ask what the name of person who owns  userid MT2RGIOP.

I want to  know  if there is a way that users can see quickly the name of the person who owns specific USERID.

I know  tcode SU01D is an option, but I don´t give  this Tcode because I don´t want employees to see more than the Name of the person.

Could you guys give me some ideas?

Thanks in advance

Sergio.