Put Installation Facts Operand level authorization in ES31

Hello,

Lets say I have maintained two operands X and Y on installation facts level in ES31. I want to give authorization for X to one user and and at the same time I dont want him to give authorization for changing operand Y. How can we achieve this?

I checked authorization object E_OPERAND. But, there we can assign activity only so, it will applicable to all operands maintained in ES31. So, it wont be useful to me.

Thanks

Viraj