Assigned to list display based on current user role and department

Hi All,
All the module contains assigned to, below are the issues we are facing
1.We have More employees, So difficult to assign tasks, meetings, etc.
2.We have same employee name in different department( Auto suggest not able correct employee bna
3.In meeting module search based on “assigned to” , Here assigned to list show all the employee names. But here only we need to display sales team alone.

Requirements:

Each module related to one or multiple departments involved, So only related employee has to display in the list.

Kindly guide me how to achieve this.

we have department for each user

Hi All,
Any one have idea about this???

If any one not understand questions let me know.

Hi,

This should be possible with Security Suite Full edition

Hi,
Any other methods are there to build a same concept.