Rounding working time per task

I have different types of projects

"technical" where I round the working hours to the next 15 minutes
"legal" where I have to round to the next minute
Currently I cannot do that with the working hours app. It would be great to have a general setting and local overrides on tasks.

KlausFenchel Currently I cannot do that with the working hours app

You can already do this with rounding tags, see here