Any help will be appreciated.

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I would like to change the world, but they don´t give me the source code.
MS Windows 7 Ultimate 64-Bit
Intel(R) Core(TM)2 Quad CPU Q9300 2.50 GHz
6.00 GB of RAM, NVIDIA GeForce 9800 GT

MacBook Pro i5 OSX Lion

Thanks Ben
The Oracle issue came with my client constraint as this is the database they have. So I Think I will follow the first approach you gave me to handle security within the project.

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I would like to change the world, but they don´t give me the source code.
MS Windows 7 Ultimate 64-Bit
Intel(R) Core(TM)2 Quad CPU Q9300 2.50 GHz
6.00 GB of RAM, NVIDIA GeForce 9800 GT

MacBook Pro i5 OSX Lion

Yeah, I think it would be the easiest way to implement security.  You'll just have to make sure you add both data sources (one for the security connection string to SQL Server, and one for the Oracle connection string).  I would recommend leaving the Oracle data source as the default data source (by specifying a data source key of an empty string [""]) and set the data source key for the security data source to something else, like "SecurityDataSourceKey".  You'll then need to set the MicroFour.StrataFrame.Security.SecurityBasics.SecurityDataSourceKey property to "SecurityDataSourceKey" to tell SF that the security tables are not in the main database, but to use the other connection string to reach them.