Hello Abhi,
You can achieve it by configuring you employee in the organisation structure in the tcode PPOMA_CRM .
Goto tcode PPOMA_CRM,
select your organizational unit, Go to the Position of the employee,
>If employee is not added to the position the add by right clicking on position and select assign. Now a pop will come, select owner, a popup will come. Search for employee by giving business partner or giving some other parameter. Select the employee. Employee will be added to the Position.
>If employee is already exiting in the position you can directly proceed with the next step.
>Now right click on the employee-> assign ->give the search term as the crm login id of the employee-> select it-> click ok.
Now you have assigned employee to the login id of the employee. So when ever the employee login's in crm his name will be auto populated as the employee responsible.
Hope its works,
Reward if useful,
Regards,
Sami.