Splash out on 7 more resistors and hook them to each segment...

yes of course resistor should be connected to segment but my question was about the common which means 1 resistor in addition

in total will be 9: 8 to segments and 1 on the commons so is that a right thing to do ?

it simply means it wont be equal brightness of all the segments (some segments will be dimmer/brighter) and the less lit up the brighter it becomes ...

the only concern would be 1 segment consuming more than it should potentially damaging it, but you said 1k resistor ? then no....