Not in accordance with Victorian road rules, as I interpret them. Here's the ruling (again, my bolding):
112 Giving a left change of direction signal when
entering a roundabout
(1) This rule applies to a driver entering a roundabout
if—
(a) the driver is to leave the roundabout at the
first exit after entering the roundabout; and
(b) the exit is less than halfway around the
roundabout.
(2) Before entering the roundabout, the driver must
give a left change of direction signal for long
enough to give sufficient warning to other drivers
and pedestrians.
Penalty: 3 penalty units.
Note
Left change of direction signal is defined in the dictionary.
(3) The driver must continue to give the change of
direction signal until the driver has left the
roundabout.
Penalty: 3 penalty units.
(4) This rule does not apply to a driver if the driver's
vehicle is not fitted with direction indicator lights.
Note
Driver's vehicle is defined in the dictionary.
113
Giving a right change of direction signal when
entering a roundabout
(1)
This rule applies to a driver entering a roundabout
if the driver is to leave the roundabout more than
halfway around it.
(2) Before entering the roundabout, the driver must
give a right change of direction signal for long
enough to give sufficient warning to other drivers
and pedestrians.
Penalty: 3 penalty units.
Note
Right change of direction signal is defined in the
dictionary.
(3) The driver must continue to give the change of
direction signal while the driver is driving in the
roundabout, unless—
(a) the driver is changing marked lanes, or
entering another line of traffic; or
(b) the driver's vehicle is not fitted with
direction indicator lights; or
(c) the driver is about to leave the roundabout.
Penalty: 3 penalty units.
Notes
1 Driver's vehicle and marked lane are defined in the
dictionary.
2 Rule 117 deals with giving change of direction signals
before changing marked lanes, or entering another line
of traffic, in a roundabout.
3 Rule 118 requires a driver, if practicable, to give a left
change of direction signal when leaving a roundabout.
The important distinction with the rule is not necessarily the exit number, but moreso whether the exit is before or after the halfway point of the roundabout. So, in the scenario you have given above, if you are to leave the roundabout at the halfway point, there is no requirement to give any signal. Interestingly, the rules are silent on the requirements for leaving the roundabout at the halfway point.
