Dynamic User Decision Texts

1. Is there a way to configure WF for Dynamic user decision texts? Depending on a flag I might want the user to have two decisons like "Accept" or "Reject" or in some cases three decisions like ""Accept" or "Reject" or "Cancel" or etc etc.

2. If the above is not possible, can I have maybe 4 fixed User decision texts and dynamically enable or visible them as I need. For example I can have "Accept" or "Reject" or "Cancel", but I may need on ""Accept" or "Reject", so make Cancel invisible..Is this possible..

Thanks a lot in advance..I will award points..

Amlan