If you are using the new Google Drive you can still search by owner!
Type the word “owner” followed by a colon. No space and then the email address of the owner. This will filter your Google Drive for all of the documents that are owned by that email address.
You can also filter by typing the word “to” followed by a colon. No space and then the email address. This will filter Google Drive for documents that are shared with that email address.
Instead of the word owner you can also use the word “from.” In other words, Google Drive is filtering documents that are from that person.