Security Not working.

In a read-only grid, you need to apply the showWhen parameter to the grid column itself, not to fields inside the column.

a!gridColumn(
  label: "Column Name",
  value: fv!row.fieldName,
  showWhen: a!isUserMemberOfGroup(
    username: loggedInUser(),
    groups: cons!IP_GRP_RECRUITERS
  )
)

What is the correct way to put this showwhen field in a local variable. Can you please guide me through it.

Firstly, Your main issue got solved?

Yes ,

Now this above one is a different interface.

Define the local variable before using it in the grid column. Use the same condition that was previously inline. Reference the variable in the showWhen parameter

a!localVariables(
  local!textField,
  local!isDisplay: a!isUserMemberOfGroup(
    username: loggedInUser(),
    groups: cons!ACM_GRP_ADMINS
  ),
  /*Replace this with your grid*/
  a!textField(
    label: "Field",
    value: local!textField,
    saveInto: local!textField,
    showWhen: local!isDisplay
  )
)

You cant put a showhen in a local but you can put a local variable inside a showWhen!
You need to declare a local variable with the condition or function then put that local variable against showhen of the field you want to evaluate visibility for!

You cant put a showhen in a local but you can put a local variable inside a showWhen!
You need to declare a local variable with the condition or function then put that local variable against showhen of the field you want to evaluate visibility for!