Redmine

This is surely already the case. Create a new class of user and
allow them to issue and withdraw tickets and nothing else.

I give a +1 to this feature request: it would be so lovely that only manager or developers could assign issues... :)

+1 from me too :)

me too.

We have to consider that issues can be automatically assigned by selecting a category.

So there should be an additional permission "Select issue category" (besides "Assign issue") which will not be given to the "Client" role.

My software group would be very happy to have this ability. We are new Redmine users and like what we have seen so far...

we are having problems with anonymous users (who we allow to submit a new issue) they are assigning it to the list of developers and we dont want them to assign issues only submit the problem
so +1 for us also

i would like to reopen this as this is a problem as is spam by anonymous users

+1
More generally: each role could have configurable list of items available on issue submitting.
It is not reasonable to enable to client to set up e.g. Estimated time, “Done %”, or certain customized internal items…

Issue is definetely a must.. +1

This feature would be very useful for our workflow. It facilitates a model where only designated people actually review and assign issues.

This is covered by feature request #8050 : "Mightful workflow field enhancement: visible, read only and mandatory"