I'm not sure how you could do this. Since FitDay PC "syncs" with your online account obviously it downloads your custom foods. The only problem would be that if you enter your husband's data and re-sync it will go into your online account. If you did an initial sync and just used FitDay PC for your husband off-line I guess that would work but any subsequent additions to your customs foods would have to be done to both accounts manually.
I'll mess around with my FitDay PC and see if I can find any better solution.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.