How to pass multiple taxonomy term arguments

Starting to use viewfield all the time... I want to pass multiple taxonomy terms to the view that is to be inserted into node by manually adding city names. My editors will never know the Term Ids so have to use the actual term name. It says we can pass comma separated arguments. Could I get an explication or pointed to how to set the view up to accept the multiple term names such as city1,city2,city3 that are added in the viewfield argument box? I appreciate that this is probably a views issue, but not getting any luck there. Does the view have to be a term Id argument and then need php code to convert the term names to term ids? Tried several versions of that but not getting anywhere. Thanks