Using the forum for general questionsBrowser Info Environment
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Assign any user you want to have FEFM access to a group. Then just put an FEFM block on the profile page and select a the group. Concrete5 permissions can then be used so that the FEFM that pops up manages files and file sets specific to that user - this is governed by user and task permissions set from the dashboard.
For the coming Concrete 5.6 release I have a change proposed for the core BlockController class that will enable addons like FEFM to be easily adapted based on page or user attributes, so there could be other mechanisms available in the future.
EDIT: My Magic Data addon with c5.6+ provides many ways to make a page adapt to the page owner, current user, or a user specified in a page attribute.