I’m sorry, but I don’t know if I fully understand your questions.
Regarding your girlfriend/ex-husband’s situation, form FL-150 is based on current income, not income as of date of separation.
Stock options are one of the most complicated issues in a divorce. Options that are granted during marriage are community property; however, since they are tied to your ongoing post-separation employment, there is also a separate property interest. The community/separate components of the options are apportioned using a formula, the most common ones based on cases (Hug and Nelson). Options that vest shortly after separation will be nearly all community property, whereas options that vest years after separation will be primarily separate property.
On top of the property division aspect, the separate property component of your stock options is related to another issue, namely support. Your separate property stock option income is income available for both child and spousal support. In general, the community income from stock options is excluded from a support calculation, since each of you is receiving 50%. The income from your stock options is based/calculated on the vesting date, NOT the date you actually exercise.
Finally, I don’t have nearly enough information to understand what “unknown money in some kind of holding account” means. Is this money from an inheritance? Employment? Investment? If you’re asking for how to disclose it on your financial disclosures (FL-140 or FL-160), you would list the account holder/institution, the date acquired (it sounds like you choose when you can receive the money, so I would put the date that the money went into the account), and the value would be “Unknown” or “TBD.”