Controlling which security group can edit a field

[AlxGr]

My approach will be to add contitions to the view to either allow edit or not on some fields . Check this sample:

Readonly field conditionally

Custom View depending field value

If any one can point me in the right direction, that would be great. I am sure this must have been done before. Is it possible to show a custom details view for a module depending on a field in the module. So for instance if the field value was a 'plot order, it would show the plot detail view, if it was “repair order” it shows the repair detail view. Thanks Pete