So when you say per Segment do you mean all the Digits on that segment together? So 10ma per Led (3x10)? or 30ma max for each led?
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After reading the Datasheet again I'm think it's per LED. I'm running 20ma 2V Leds so as per this Table I should go with a 28K resistor.
Forward voltage
ISeg 1.5V 2.0V 2.5V 3.0V 3.5V
40mA 12.2k? 11.8k? 11.0k? 10.6k? 9.69k?
30mA 17.8k? 17.1k? 15.8k? 15.0k? 14.0k?
20mA 29.8k? 28.0k? 25.9k? 24.5k? 22.6k?
10mA 66.7k? 63.7k? 59.3k? 55.4k? 51.2k?