We can apply object level security using BO designer.We have a requirement to have row level security. For example we have a prompts filter in our report. We want to restrict the user access on the list of LOV of that filter.
Prompt1 has LOV such as value1,value2. value3 etc. We want to create a restriction in such a way that user1 can see only value 1(if he got permission)but not value2 and value3 in the LOV list.
A brief sketch:
Customize your LOV in Designer (do not forget to export it with your universe later) so that it will refresh automatically and that you are forcing a join to your security table (which maps BOUSER to allowed dimension values).