By using the widgets in the Bpm- can we disable the the field in the application

By using the widgets in the Bpm- can we disable the the field in the application.
wanted to disable the the particular field in the sales order screen, by using widgets.
please do help on this …
also wanted to know the usage of attach hold LDA widget.

BPMs are server side, can you can add validation but not disable or make fields read only.

You would want Field Security Maintenance for this feature or Extended Column Maintenance