text: I think you can't. There are two reasons for that.\n1.) Yahoo does not necessarily show the yahoo id of the person asking or answering question. You can create an alias or a nick name.\n2.) You can not search on the basis of person's name. There is no options in the advanced search also.\n\nI personally feel that this setting is right. If I am asking questions, why should I be known to people.\n\nHope it helps.