CheckBox disabled based on a user

What are the chances that I can disable a CheckBox On the screen based on a given user ? is it possible to do it in a bpm ? or what other way can do it ?

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You can do that with a simple cross view Row Rule.

Create a new Row Rule and for “Rule View”, select the View that contains the Checkbox to be disabled. In the Row Rule Condition select the CallContextClient as the View and CurrentUserId as the Field, Rule Condition Equals, and the the Rule Value is the UserID of the user to block.

In the Rule Action, select the Checkbox to disable with a Setting Style of Disabled.

Depending on your end goal, blocking the user from adjusting the Checkbox with BPM should be considered.