Hi Imran,

The other responses have correctly identified that you can do this using the Last Logged In User value but I'd like to suggest you mature your Hardware Asset Management practices to include population of the Assigned To value at the time of asset delivery to the end-user. In the base Asset plugin, this is a manual function. In the Hardware Asset Management application, the out of box request flow will set the Assigned To, to the Requested For value when using the out of box asset request catalog item.