| A| B| C| D|
------------------------------------------
1|Task |Desc |Hrs |Date |
2|Stucco |
3|Paint |
4|Plumb |

Lets say above is my sample spread sheet. How can I
block/lock the cells for col B, Col C and Col D in a row
if the value in Col A of same row is not "Plumb".

In other words if A2 is not equal to "Plumb" then cells
B2, C2 and D2 has to be locked and made not editable or
non-data-enterable.

Thanks
Mario