Well I don't know of a way, but in Belgium's case their federation's website (the websites of many countries can be found on IBU's site under 'Federations') list a certain 'Rieke De Maeyer' as part of the IBU Cup team, so it must be her, she's the only female there.
Chile will be cool. She was quite slow, but it's great that she's competing. That means all the Latin American countries have done relays. Is Argentina competing this year, I wonder? Same strategy as Brazil, maybe?
I wonder about Greece's relay team, will the second woman be Nimpiti? I remember her in the JWC, she wasn't too great, but maybe she's improved?