I agree with Philip. However, with a broad breakdown in trust (the norm behind the norms) and the advent of what some call ´neo-tribalism´ these networks and associated social capital may be becoming fragmented, for want of a better word. For measures of the breakdown of trust within countries and between them I suggest the World Values Survey, which has been conducted usually annually for at least a decade or so.
There is no contradiction. Both networks and communities have norms, but are structured differently. Nevertheless, the approaches are supplementary, not contradictory.
Social Capital is about trust; about extending support to the members of your community of interest expecting return not from the recipient of support-directly, immediately or in equal quantity- but from the community when the need arises. This community can be a residential, virtual, value based, blood based or economic interest based community (like a guild) or trade union. I don't see in contradiction between the two views of community.
in general there is no contradiction, but the contradiction is likely to occur between the components of the social capital at different levels and between different community groups, in particular due to differences in the value systems