Please update on this item if anybody can help me to achieve this output. 

Hi Shahnawaz,

I'm do not believe that XPP has the ability to partially change the characteristics of a table box rule, including the suppressing (cancelling) of it.

You might have to resort to suppressing the whole left and top box rules, and then manually drawing in the box rules for the cells where you want them.

Other customers may have other ideas on how to accomplish what you need to do.

Hi Shahnawaz

You could set the Column Heads (4 columns) and the Table Body (5 columns) as 2 separate tables. Ending the tabular after the Column Heads and starting a new tabular for the Table Body. Then aligning the Column Heads with the Correct Table Body columns. 

Pam Schoenrock

Shahnawaz,

Another possibility is at the end of the table to use the <whichcol> and <whichrow> macro's in combination with the %tbcwidth and %tbrdepth variable to figure out the width and depth of the 1st col and row and then blank out the normal rule by drawing a white rule on top of it.
Not a task for the faint of heart, but feasible.
The only restriction is that the table must be contained on the page as the start and end of the table must be on the same page.

Thank you Pam for your input. I splitted the table and able to achieve the the desired output.

Thank you Bart for your input but I splitted the table into two parts and able to achieve the the desired output.