Yes! If the fork uses the same address format and protocol (NXTquant and number variables).
Just use different passwords for all forks, then you are good!
Asking you this because NTX:
https://bitcointalksearch.org/topic/annntxfirst-anon-coin-based-nxtbig-bounties-trading-on-bter-now-625668
Is telling people its OK to use their usual NXT account for the fork they planning to launch. Is this a fishing attempt (so to speak?) See the faq at 2/3 of the OP announcement.
Maybe he doesn't know anybetter or the prefix really makes broadcasting NTX transactions in NXT impossible.
Just don't risk it and make a new account