If you are looking for some user, please try http://people.csa.iisc.ernet.in/~user and you will reach their homepage if they have one. Alternatively, you can search using the form below:
If the user is receiving messages (and is currently logged in), you can send a message here... (this is not an e-mail, it is a simple zephyrgram). Make sure you identify yourself in the message. The recipient has no way of knowing it otherwise...
Or try searching the alumni database. The person might be maintaining a page there after passing out of the department:
If you are within CSA, you may want to look at this page for instructions on creating your webpage in CL/CSA.