I would just add the IsAllowed etc. as a comment next to the relevant line.
Often the explanation is bigger than what you'd want in a variable name, I find it less overhead than making more variables, and it makes better use of screen-space.
I'd only lean towards intermediate variables if
a) there's lots of smaller conditionals being aggregated up into bigger conditionals which makes line-by-line comments insufficient or
b) I'm reusing the same conditional a lot (this is mostly to draw the reader's attention to the fact that the condition is being re-used).
I'd only lean towards intermediate variables if a) there's lots of smaller conditionals being aggregated up into bigger conditionals which makes line-by-line comments insufficient or b) I'm reusing the same conditional a lot (this is mostly to draw the reader's attention to the fact that the condition is being re-used).