Not sure how many you have to do, but you can manually set each line/stroke around a cell.

When you have a table or portion of a table (ie cell, row, column) selected you get a grid that shows in the stroke panel and in the top control panel (if you have tables selected in your options for the panel).

Then select the exact divider line you want to change (will show up in blue). Then customize the settings. So you could have a cell with a different stroke style on each side if you wanted. You will notice if you have different controls depending on how many cells you select.

Step 3 in the “Add strokes and fills to cells”
https://helpx.adobe.com/indesign/using/table-strokes-fills.html

Hi @erwin bryce. Thanks for your reply, I am trying to do the same thing but I dont know how to set the custom mode. Can you please explain more?