Yes - but the user is also member of "alle" - and will be given access due to this membership.
Problem would also occur if you make 2 groups: "fcp" and "fcp2" and put a user into both. One have access another does not. Then the user will have access.
If a specific user have a deny, but is a member of a group that has accesss, the deny permission of the user will overrule the allow permission of the group.
If we check access from top to bottom then the following would apply:
admin1 can see this page
FCPuser1 can not see this page
anonymous user can see this page
I'll have it added as a change request - a possibility from control panel setting up how to handle opposite permissions on the same level.
If a user is member of 2 groups, one have allow the other deny - how should that be handled. This way all users would have access, but things disappear when you login... and so on.