How to define a custome property in User Profile to Save Roles Sort priority ?

Hi All,

I have a requirement where in, user should get an option to decide his default tab(role), when he logs into portal.

e.g.: If user1 and User2 is assigned with 2 roles namely Leave & Travel. User1 should be able to select Leave as his default tab and User2 should be able to select Travel as his default tab.

I was thinking if I can store what use selects in a custom property and change the tabs through custom application.

Please let me know how can achieve this in CE 7.3 portal.

Thanks in Advance,

Pavan.