Hello Mohan ,
DLP is about confidential data and its tracking which can be done easily using Keywords ,IDM and EDM .You can also specify conditions such as apply the Policy for only certain users .May be this is what you are looking for . In that case ,you can make a Test Policy and in detection rules choose All Protocols and the user you want to to track .You also have to specify the response which for this case ,can be logging to a syslog Server . Try this and see if it helps .