I don't have CONN open in front of me, but I thought there was a way to run a 2nd level analysis between groups (and/or conditions) for a particular selected ICA network under the Spatial Tab?  I'm not certain what the metric is here, but it might be an ICC constrained to only those areas within the ICA network/ROIs.  I would be helpful to get clarification on the best possible way to approach a within-network constrained analysis via ICA.  Is one relegated to only using ROI-to-ROI analyses on a specific a priori ICA network, or could you find the network you are interested in via ICA, and then run voxel-wise analyses looking for within-network degree centrality issues (ICC) or local connectivity issues (ILC)?
 
Jeff