Is it possible to set different roles to see different data in one space?
Sure. You can configure different permissions (Read, Create, Update, Archive/Unarchive) per Role, for different Content Types.
Roles, Create a new role of just update existing one. In
Content section choose
Read and define what
Content Type users with this role are allowed to have an access to.
Let me know if you need any further assistance. Also, this article would be helpful https://www.contentful.com/r/knowledgebase/roles-and-permissions/#one-writer-one-translator-one-editor-setting-up-a-bilingual-project-with-contentful.