Application Express :: IR Report With Heading Label

i have IR report with 15 column with heading.

The end user can accessing from different department, when the user can see the report shown only their particular department rows only. each department have different column value and Header label .how can display the column header depend on the department user.

e.g. IR report view

Seq# -- Department -- date -- Subject/Customer Message
1                          Communication done with Jony(from HR department)
2                          low sales from East region(from Sales Department)

IN the IR report Table data structure.Heading_code value as LOV in IR form(1.Subject/2.Customer Message/ect...) and Column_value as Text Field.

Seq# -- Dept_name -- Heading_code --  Column_value
1        HR              1           Communication done with Jony
2        Sales           2           low sales from East region

Apex have limitation of one IR report in one page. so i could not create different Report region even i don’t want create another page due to the further functionality issue.