OTBI Analysis- restrict access at field level?

Summary

Want to hide a field within a subject area in analysis

Content

We have a requirement to create an analysis & then restrict access at field level within the subject area. Is this possible? For example, if a manger ( who has access to grade info) creates an analysis & then shares the report with his team ( who do not have access to grade). How can we hide the Grade info from the team, since it is embedded within the assignment subject area.