how to can change this?

[hakuren]

i want to change the @pk mode into this condition:

 

when @pk mode is on only wearing on this item can be attacked

ex. item is knife when player 1 pk on, player 2 has knife player 1 can be attacked player 2

if not ignore battle

 

ex. item is sword when player 1 pk off, player 2 has sword player 1 can be attacked player 2

if player 2 has knife ignore battle

 

is this possible to done?

 

thank you in advance