Happy to help :).
First of all you need an association between project and manager. I assume a manager can manage multiple projects? In that case, I would suggest a 1-* association between maanger and project. Secondly, in the entity access, you need to set a role-based restriction to the manager for the projects associated to him/her. You can find this by clicking on an enitty, go to access rules, click on a userrole and choose the second tab ‘Xpath constraint’. Third, on the home page of the manager, you need to add a listview/datagrid with entity ‘Projects'. Now the manager will only see the projects that are assigned to him/her.
Good luck Arpita! Hope this helps.