Placeholder can be used for a text based control where user accessing the application will be indicated what to do next with the control. I believe there is no direct way to achieve your requirement of changing the placeholder value depending on condition by OOTB.
Could you please elaborate your usecase to understand better.
i have a field in section which has placeholder. that section is same for two different access groups (Let like US & INDIA )with some content changes. No i have requirement to remove placeholder for that particular field to one of AccessGroups